Gitiles
Code Review Sign In
gerrit-public.fairphone.software / platform / external / valgrind / f486035e8aab80f4543c774b7029b892f5e45417 / . / priv / host-ppc32 / isel.c
blob: 8123a162c9ffa8d93d38a1419ddee25b3bfa76f1 [file] [log] [blame]
/*---------------------------------------------------------------*/
/*--- ---*/
/*--- This file (host-ppc32/isel.c) is ---*/
/*--- Copyright (c) 2005 OpenWorks LLP. All rights reserved. ---*/
/*--- ---*/
/*---------------------------------------------------------------*/
/*
This file is part of LibVEX, a library for dynamic binary
instrumentation and translation.
Copyright (C) 2004-2005 OpenWorks, LLP.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; Version 2 dated June 1991 of the
license.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or liability
for damages. See the GNU General Public License for more details.
Neither the names of the U.S. Department of Energy nor the
University of California nor the names of its contributors may be
used to endorse or promote products derived from this software
without prior written permission.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
*/
#include "libvex_basictypes.h"
#include "libvex_ir.h"
#include "libvex.h"
#include "ir/irmatch.h"
#include "main/vex_util.h"
#include "main/vex_globals.h"
#include "host-generic/h_generic_regs.h"
#include "host-ppc32/hdefs.h"
/*---------------------------------------------------------*/
/*--- Register Usage Conventions ---*/
/*---------------------------------------------------------*/
/*
Integer Regs
------------
GPR0 Reserved
GPR1 Stack Pointer
GPR2 TOC pointer - not used
GPR3:12 Allocateable
GPR13 Thread-specific pointer - not used
GPR14:29 Allocateable
GPR30 AltiVec temp spill register
GPR31 GuestStatePointer
Of Allocateable regs:
GPR3:12 Caller-saved regs
GPR14:29 Callee-saved regs
GPR3 [Return | Parameter] - carrying reg
GPR4:10 Parameter-carrying regs
Floating Point Regs
-------------------
FPR0:31 Allocateable
FPR0:13 Caller-saved regs
FPR14:31 Callee-saved regs
*/
/*---------------------------------------------------------*/
/*--- PPC32 FP Status & Control Register Conventions ---*/
/*---------------------------------------------------------*/
/*
Vex-generated code expects to run with the FPU set as follows: all
exceptions masked, round-to-nearest.
This corresponds to a FPU control word value of 0x0.
%fpscr should have this value on entry to Vex-generated code,
and those values should be unchanged at exit.
Warning: For simplicity, set_FPU_rounding_* assumes this is 0x0
- if this is changed, update those functions.
*/
/*---------------------------------------------------------*/
/*--- misc helpers ---*/
/*---------------------------------------------------------*/
/* These are duplicated in guest-ppc32/toIR.c */
static IRExpr* unop ( IROp op, IRExpr* a )
{
return IRExpr_Unop(op, a);
}
#if 0
static IRExpr* binop ( IROp op, IRExpr* a1, IRExpr* a2 )
{
return IRExpr_Binop(op, a1, a2);
}
#endif
//.. static IRExpr* mkU64 ( ULong i )
//.. {
//.. return IRExpr_Const(IRConst_U64(i));
//.. }
//..
//.. static IRExpr* mkU32 ( UInt i )
//.. {
//.. return IRExpr_Const(IRConst_U32(i));
//.. }
static IRExpr* bind ( Int binder )
{
return IRExpr_Binder(binder);
}
/*---------------------------------------------------------*/
/*--- ISelEnv ---*/
/*---------------------------------------------------------*/
/* This carries around:
- A mapping from IRTemp to IRType, giving the type of any IRTemp we
might encounter. This is computed before insn selection starts,
and does not change.
- A mapping from IRTemp to HReg. This tells the insn selector
which virtual register(s) are associated with each IRTemp
temporary. This is computed before insn selection starts, and
does not change. We expect this mapping to map precisely the
same set of IRTemps as the type mapping does.
- vregmap holds the primary register for the IRTemp.
- vregmapHI is only used for 64-bit integer-typed
IRTemps. It holds the identity of a second
32-bit virtual HReg, which holds the high half
of the value.
- A copy of the link reg, so helper functions don't kill it.
- The code array, that is, the insns selected so far.
- A counter, for generating new virtual registers.
- The host subarchitecture we are selecting insns for.
This is set at the start and does not change.
Note, this is all host-independent. (JRS 20050201: well, kinda
... not completely. Compare with ISelEnv for amd64.)
*/
typedef
struct {
IRTypeEnv* type_env;
HReg* vregmap;
HReg* vregmapHI;
Int n_vregmap;
HReg savedLR;
HInstrArray* code;
Int vreg_ctr;
VexSubArch subarch;
}
ISelEnv;
static HReg lookupIRTemp ( ISelEnv* env, IRTemp tmp )
{
vassert(tmp >= 0);
vassert(tmp < env->n_vregmap);
return env->vregmap[tmp];
}
static void lookupIRTemp64 ( HReg* vrHI, HReg* vrLO, ISelEnv* env, IRTemp tmp )
{
vassert(tmp >= 0);
vassert(tmp < env->n_vregmap);
vassert(env->vregmapHI[tmp] != INVALID_HREG);
*vrLO = env->vregmap[tmp];
*vrHI = env->vregmapHI[tmp];
}
static void addInstr ( ISelEnv* env, PPC32Instr* instr )
{
addHInstr(env->code, instr);
if (vex_traceflags & VEX_TRACE_VCODE) {
ppPPC32Instr(instr);
vex_printf("\n");
}
}
static HReg newVRegI ( ISelEnv* env )
{
HReg reg = mkHReg(env->vreg_ctr, HRcInt32, True/*virtual reg*/);
env->vreg_ctr++;
return reg;
}
static HReg newVRegF ( ISelEnv* env )
{
HReg reg = mkHReg(env->vreg_ctr, HRcFlt64, True/*virtual reg*/);
env->vreg_ctr++;
return reg;
}
static HReg newVRegV ( ISelEnv* env )
{
HReg reg = mkHReg(env->vreg_ctr, HRcVec128, True/*virtual reg*/);
env->vreg_ctr++;
return reg;
}
/*---------------------------------------------------------*/
/*--- ISEL: Forward declarations ---*/
/*---------------------------------------------------------*/
/* These are organised as iselXXX and iselXXX_wrk pairs. The
iselXXX_wrk do the real work, but are not to be called directly.
For each XXX, iselXXX calls its iselXXX_wrk counterpart, then
checks that all returned registers are virtual. You should not
call the _wrk version directly.
*/
static PPC32RI* iselIntExpr_RI_wrk ( ISelEnv* env, IRExpr* e );
static PPC32RI* iselIntExpr_RI ( ISelEnv* env, IRExpr* e );
static HReg iselIntExpr_R_wrk ( ISelEnv* env, IRExpr* e );
static HReg iselIntExpr_R ( ISelEnv* env, IRExpr* e );
static PPC32AMode* iselIntExpr_AMode_wrk ( ISelEnv* env, IRExpr* e );
static PPC32AMode* iselIntExpr_AMode ( ISelEnv* env, IRExpr* e );
static void iselInt64Expr_wrk ( HReg* rHi, HReg* rLo,
ISelEnv* env, IRExpr* e );
static void iselInt64Expr ( HReg* rHi, HReg* rLo,
ISelEnv* env, IRExpr* e );
static PPC32CondCode iselCondCode_wrk ( ISelEnv* env, IRExpr* e );
static PPC32CondCode iselCondCode ( ISelEnv* env, IRExpr* e );
static HReg iselDblExpr_wrk ( ISelEnv* env, IRExpr* e );
static HReg iselDblExpr ( ISelEnv* env, IRExpr* e );
static HReg iselFltExpr_wrk ( ISelEnv* env, IRExpr* e );
static HReg iselFltExpr ( ISelEnv* env, IRExpr* e );
static HReg iselVecExpr_wrk ( ISelEnv* env, IRExpr* e );
static HReg iselVecExpr ( ISelEnv* env, IRExpr* e );
/*---------------------------------------------------------*/
/*--- ISEL: Misc helpers ---*/
/*---------------------------------------------------------*/
//.. /* Is this a 32-bit zero expression? */
//..
//.. static Bool isZero32 ( IRExpr* e )
//.. {
//.. return e->tag == Iex_Const
//.. && e->Iex.Const.con->tag == Ico_U32
//.. && e->Iex.Const.con->Ico.U32 == 0;
//.. }
/* Shift helper */
static PPC32Instr* mk_sh32 ( ISelEnv* env, PPC32ShiftOp shOp,
HReg r_dst, HReg r_srcL, PPC32RI* ri_srcR )
{
HReg zero, tmp;
vassert(hregClass(r_dst) == HRcInt32);
vassert(hregClass(r_srcL) == HRcInt32);
// Note: In this context, GPR0 is NOT read -> just gives _value_ 0
zero = hregPPC32_GPR0();
tmp = newVRegI(env);
switch (shOp) {
case Psh_SHL:
case Psh_SHR: // These ops only take regs as args...
if (ri_srcR->tag == Pri_Imm) {
if (ri_srcR->Pri.Imm.imm32 < 32) {
addInstr(env, PPC32Instr_Alu32(Palu_ADD, tmp, zero, ri_srcR));
return PPC32Instr_Sh32(shOp, r_dst, r_srcL, PPC32RI_Reg(tmp));
} else { // shift > 31 => zero
return PPC32Instr_Alu32(Palu_ADD, r_dst, zero, PPC32RI_Imm(0));
}
} else {
return PPC32Instr_Sh32(shOp, r_dst, r_srcL, ri_srcR);
}
case Psh_SAR: // No problem here.
return PPC32Instr_Sh32(Psh_SAR, r_dst, r_dst, ri_srcR);
default:
vpanic("");
}
}
/* Make an int reg-reg move. */
static PPC32Instr* mk_iMOVds_RR ( HReg r_dst, HReg r_src )
{
vassert(hregClass(r_dst) == HRcInt32);
vassert(hregClass(r_src) == HRcInt32);
return PPC32Instr_Alu32(Palu_OR, r_dst, r_src, PPC32RI_Reg(r_src));
}
/* Load an RI to a reg */
static PPC32Instr* mk_iMOVds_RRI ( ISelEnv* env, HReg r_dst, PPC32RI* ri_src )
{
HReg zero;
vassert(hregClass(r_dst) == HRcInt32);
// Note: In this context, GPR0 is NOT read -> just gives _value_ 0
zero = hregPPC32_GPR0();
if (ri_src->tag == Pri_Imm) {
UInt imm = ri_src->Pri.Imm.imm32;
if (imm >= 0xFFFF8000 || imm <= 0x7FFF) { // sign-extendable from 16 bits?
return PPC32Instr_Alu32(Palu_ADD, r_dst, zero, PPC32RI_Imm(imm & 0xFFFF));
}
if (imm > 0xFFFF) {
// CAB: perhaps add Palu_ADDIS ?
addInstr(env, PPC32Instr_Alu32(Palu_ADD, r_dst, zero, PPC32RI_Imm(imm>>16)));
addInstr(env, mk_sh32(env, Psh_SHL, r_dst, r_dst, PPC32RI_Imm(16)));
return PPC32Instr_Alu32(Palu_OR, r_dst, r_dst, PPC32RI_Imm(imm & 0xFFFF));
}
// Load immediate _without_ sign extend
addInstr(env, PPC32Instr_Alu32(Palu_ADD, r_dst, zero, PPC32RI_Imm(0)));
return PPC32Instr_Alu32(Palu_OR, r_dst, r_dst, ri_src);
} else {
// Just mr rD,rS
return PPC32Instr_Alu32(Palu_OR, r_dst, ri_src->Pri.Reg.reg, ri_src);
}
}
/* Given unknown RI, make an RI->imm fit into 16 bits, _signedly_:
If can't get imm from sign-extending 16 bits, load to reg.
*** Sign-extending instn's should use this ***
*/
static PPC32RI* mk_FitRI16_S ( ISelEnv* env, PPC32RI* ri )
{
HReg tmp = newVRegI(env);
if (ri->tag == Pri_Imm) {
UInt imm = ri->Pri.Imm.imm32;
if (imm > 0x7FFF && imm < 0xFFFF8000) { // can't sign-extend from 16 bits
addInstr(env, mk_iMOVds_RRI(env, tmp, ri));
return PPC32RI_Reg(tmp);
}
return PPC32RI_Imm(imm & 0xFFFF);
}
return ri;
}
/* Given unknown RI, make an RI->imm fit into 16 bits, _unsignedly_:
If can't fit in 16 bits, load to reg.
*** Non-sign-extending instn's should use this ***
*/
static PPC32RI* mk_FitRI16_U ( ISelEnv* env, PPC32RI* ri )
{
HReg tmp = newVRegI(env);
if (ri->tag == Pri_Imm) {
UInt imm = ri->Pri.Imm.imm32;
if (imm > 0xFFFF) {
addInstr(env, mk_iMOVds_RRI(env, tmp, ri));
return PPC32RI_Reg(tmp);
}
return PPC32RI_Imm(imm & 0xFFFF);
}
return ri;
}
//.. /* Make a vector reg-reg move. */
//..
//.. static X86Instr* mk_vMOVsd_RR ( HReg src, HReg dst )
//.. {
//.. vassert(hregClass(src) == HRcVec128);
//.. vassert(hregClass(dst) == HRcVec128);
//.. return X86Instr_SseReRg(Xsse_MOV, src, dst);
//.. }
/* Advance/retreat %sp by n. */
static void add_to_sp ( ISelEnv* env, Int n )
{
HReg sp = StackFramePtr;
vassert(n > 0 && n < 256 && (n%16) == 0);
addInstr(env, PPC32Instr_Alu32(Palu_ADD, sp, sp, PPC32RI_Imm(n)));
}
static void sub_from_sp ( ISelEnv* env, Int n )
{
HReg sp = StackFramePtr;
vassert(n > 0 && n < 256 && (n%16) == 0);
addInstr(env, PPC32Instr_Alu32(Palu_ADD, sp, sp, PPC32RI_Imm(-n & 0xFFFF)));
}
/* Load 2*I32 regs to fp reg */
static HReg mk_LoadRRtoFPR ( ISelEnv* env, HReg r_srcHi, HReg r_srcLo )
{
HReg fr_dst = newVRegF(env);
PPC32AMode *am_addr0, *am_addr1;
sub_from_sp( env, 16 ); // Move SP down 16 bytes
am_addr0 = PPC32AMode_IR(0, StackFramePtr);
am_addr1 = PPC32AMode_IR(4, StackFramePtr);
// store hi,lo as Ity_I32's
addInstr(env, PPC32Instr_Store( 4, am_addr0, r_srcHi ));
addInstr(env, PPC32Instr_Store( 4, am_addr1, r_srcLo ));
// load as float
addInstr(env, PPC32Instr_FpLdSt(True/*load*/, 8, fr_dst, am_addr0));
add_to_sp( env, 16 ); // Reset SP
return fr_dst;
}
/* Given an amode, return one which references 4 bytes further
along. */
static PPC32AMode* advance4 ( ISelEnv* env, PPC32AMode* am )
{
PPC32AMode* am4 = dopyPPC32AMode(am);
switch (am4->tag) {
case Pam_IR:
am4->Pam.RR.index += 4; break;
case Pam_RR:
// This trashes r_index, which might be used by others later.
// Disable for the moment. If needs to be reinstated, construct
// (r_index+4) in a new register and use that instead.
//{
// HReg r_index = am4->Pam.IR.index;
// addInstr(env, PPC32Instr_Alu32(Palu_ADD, r_index, r_index,
// PPC32RI_Imm(4)));
// break;
// }
default:
vpanic("advance4(ppc32,host)");
}
return am4;
}
//.. /* Push an arg onto the host stack, in preparation for a call to a
//.. helper function of some kind. Returns the number of 32-bit words
//.. pushed. */
//..
//.. static Int pushArg ( ISelEnv* env, IRExpr* arg )
//.. {
//.. IRType arg_ty = typeOfIRExpr(env->type_env, arg);
//.. if (arg_ty == Ity_I32) {
//.. addInstr(env, X86Instr_Push(iselIntExpr_RMI(env, arg)));
//.. return 1;
//.. } else
//.. if (arg_ty == Ity_I64) {
//.. HReg rHi, rLo;
//.. iselInt64Expr(&rHi, &rLo, env, arg);
//.. addInstr(env, X86Instr_Push(X86RMI_Reg(rHi)));
//.. addInstr(env, X86Instr_Push(X86RMI_Reg(rLo)));
//.. return 2;
//.. }
//.. ppIRExpr(arg);
//.. vpanic("pushArg(x86): can't handle arg of this type");
//.. }
/* Used only in doHelperCall. See big comment in doHelperCall re
handling of register-parameter args. This function figures out
whether evaluation of an expression might require use of a fixed
register. If in doubt return True (safe but suboptimal).
*/
static
Bool mightRequireFixedRegs ( IRExpr* e )
{
switch (e->tag) {
case Iex_Tmp: case Iex_Const: case Iex_Get:
return False;
default:
return True;
}
}
/* Do a complete function call. guard is a Ity_Bit expression
indicating whether or not the call happens. If guard==NULL, the
call is unconditional. */
static
void doHelperCall ( ISelEnv* env,
Bool passBBP,
IRExpr* guard, IRCallee* cee, IRExpr** args )
{
PPC32CondCode cc;
HReg argregs[PPC32_N_REGPARMS];
HReg tmpregs[PPC32_N_REGPARMS];
Bool go_fast;
Int n_args, i, argreg;
/* Marshal args for a call and do the call.
If passBBP is True, %rbp (the baseblock pointer) is to be passed
as the first arg.
This function only deals with a tiny set of possibilities, which
cover all helpers in practice. The restrictions are that only
arguments in registers are supported, hence only PPC32_N_REGPARMSx32
integer bits in total can be passed. In fact the only supported
arg type is I32.
Generating code which is both efficient and correct when
parameters are to be passed in registers is difficult, for the
reasons elaborated in detail in comments attached to
doHelperCall() in priv/host-x86/isel.c. Here, we use a variant
of the method described in those comments.
The problem is split into two cases: the fast scheme and the
slow scheme. In the fast scheme, arguments are computed
directly into the target (real) registers. This is only safe
when we can be sure that computation of each argument will not
trash any real registers set by computation of any other
argument.
In the slow scheme, all args are first computed into vregs, and
once they are all done, they are moved to the relevant real
regs. This always gives correct code, but it also gives a bunch
of vreg-to-rreg moves which are usually redundant but are hard
for the register allocator to get rid of.
To decide which scheme to use, all argument expressions are
first examined. If they are all so simple that it is clear they
will be evaluated without use of any fixed registers, use the
fast scheme, else use the slow scheme. Note also that only
unconditional calls may use the fast scheme, since having to
compute a condition expression could itself trash real
registers.
Note this requires being able to examine an expression and
determine whether or not evaluation of it might use a fixed
register. That requires knowledge of how the rest of this insn
selector works. Currently just the following 3 are regarded as
safe -- hopefully they cover the majority of arguments in
practice: IRExpr_Tmp IRExpr_Const IRExpr_Get.
*/
/* Note that the cee->regparms field is meaningless on PPC32 host
(since there is only one calling convention) and so we always
ignore it. */
n_args = 0;
for (i = 0; args[i]; i++)
n_args++;
if (PPC32_N_REGPARMS < n_args + (passBBP ? 1 : 0)) {
vpanic("doHelperCall(PPC32): cannot currently handle > 8 args");
// PPC32_N_REGPARMS
}
argregs[0] = hregPPC32_GPR3();
argregs[1] = hregPPC32_GPR4();
argregs[2] = hregPPC32_GPR5();
argregs[3] = hregPPC32_GPR6();
argregs[4] = hregPPC32_GPR7();
argregs[5] = hregPPC32_GPR8();
argregs[6] = hregPPC32_GPR9();
argregs[7] = hregPPC32_GPR10();
tmpregs[0] = tmpregs[1] = tmpregs[2] =
tmpregs[3] = tmpregs[4] = tmpregs[5] =
tmpregs[6] = tmpregs[7] = INVALID_HREG;
/* First decide which scheme (slow or fast) is to be used. First
assume the fast scheme, and select slow if any contraindications
(wow) appear. */
go_fast = True;
if (guard) {
if (guard->tag == Iex_Const
&& guard->Iex.Const.con->tag == Ico_U1
&& guard->Iex.Const.con->Ico.U1 == True) {
/* unconditional */
} else {
/* Not manifestly unconditional -- be conservative. */
go_fast = False;
}
}
if (go_fast) {
for (i = 0; i < n_args; i++) {
if (mightRequireFixedRegs(args[i])) {
go_fast = False;
break;
}
}
}
/* At this point the scheme to use has been established. Generate
code to get the arg values into the argument rregs. */
if (go_fast) {
/* FAST SCHEME */
argreg = 0;
if (passBBP) {
addInstr(env, mk_iMOVds_RR( argregs[argreg], GuestStatePtr ));
argreg++;
}
for (i = 0; i < n_args; i++) {
vassert(argreg < PPC32_N_REGPARMS);
vassert(typeOfIRExpr(env->type_env, args[i]) == Ity_I32 ||
typeOfIRExpr(env->type_env, args[i]) == Ity_I64);
if (typeOfIRExpr(env->type_env, args[i]) == Ity_I32) {
addInstr(env, mk_iMOVds_RR( argregs[argreg],
iselIntExpr_R(env, args[i]) ));
} else { // Ity_I64
HReg rHi, rLo;
if (argreg%2 == 1) // ppc32 abi spec for passing a LONG_LONG
argreg++; // XXX: odd argreg => even rN
vassert(argreg < PPC32_N_REGPARMS-1);
iselInt64Expr(&rHi,&rLo, env, args[i]);
addInstr(env, mk_iMOVds_RR( argregs[argreg++], rHi ));
addInstr(env, mk_iMOVds_RR( argregs[argreg], rLo));
}
argreg++;
}
/* Fast scheme only applies for unconditional calls. Hence: */
cc.test = Pct_ALWAYS;
} else {
/* SLOW SCHEME; move via temporaries */
argreg = 0;
if (passBBP) {
/* This is pretty stupid; better to move directly to r3
after the rest of the args are done. */
tmpregs[argreg] = newVRegI(env);
addInstr(env, mk_iMOVds_RR( tmpregs[argreg], GuestStatePtr ));
argreg++;
}
for (i = 0; i < n_args; i++) {
vassert(argreg < PPC32_N_REGPARMS);
vassert(typeOfIRExpr(env->type_env, args[i]) == Ity_I32 ||
typeOfIRExpr(env->type_env, args[i]) == Ity_I64);
if (typeOfIRExpr(env->type_env, args[i]) == Ity_I32) {
tmpregs[argreg] = iselIntExpr_R(env, args[i]);
} else { // Ity_I64
HReg rHi, rLo;
if (argreg%2 == 1) // ppc32 abi spec for passing a LONG_LONG
argreg++; // XXX: odd argreg => even rN
vassert(argreg < PPC32_N_REGPARMS-1);
iselInt64Expr(&rHi,&rLo, env, args[i]);
tmpregs[argreg++] = rHi;
tmpregs[argreg] = rLo;
}
argreg++;
}
/* Now we can compute the condition. We can't do it earlier
because the argument computations could trash the condition
codes. Be a bit clever to handle the common case where the
guard is 1:Bit. */
cc.test = Pct_ALWAYS;
if (guard) {
if (guard->tag == Iex_Const
&& guard->Iex.Const.con->tag == Ico_U1
&& guard->Iex.Const.con->Ico.U1 == True) {
/* unconditional -- do nothing */
} else {
cc = iselCondCode( env, guard );
}
}
/* Move the args to their final destinations. */
for (i = 0; i < argreg; i++) {
if (tmpregs[i] == INVALID_HREG) // Skip invalid regs
continue;
/* None of these insns, including any spill code that might
be generated, may alter the condition codes. */
addInstr( env, mk_iMOVds_RR( argregs[i], tmpregs[i] ) );
}
}
/* Finally, the call itself. */
addInstr(env, PPC32Instr_Call( cc,
Ptr_to_ULong(cee->addr),
n_args + (passBBP ? 1 : 0) ));
}
//.. /* Given a guest-state array descriptor, an index expression and a
//.. bias, generate an X86AMode holding the relevant guest state
//.. offset. */
//..
//.. static
//.. X86AMode* genGuestArrayOffset ( ISelEnv* env, IRArray* descr,
//.. IRExpr* off, Int bias )
//.. {
//.. HReg tmp, roff;
//.. Int elemSz = sizeofIRType(descr->elemTy);
//.. Int nElems = descr->nElems;
//..
//.. /* throw out any cases not generated by an x86 front end. In
//.. theory there might be a day where we need to handle them -- if
//.. we ever run non-x86-guest on x86 host. */
//..
//.. if (nElems != 8 || (elemSz != 1 && elemSz != 8))
//.. vpanic("genGuestArrayOffset(x86 host)");
//..
//.. /* Compute off into a reg, %off. Then return:
//..
//.. movl %off, %tmp
//.. addl $bias, %tmp (if bias != 0)
//.. andl %tmp, 7
//.. ... base(%ebp, %tmp, shift) ...
//.. */
//.. tmp = newVRegI(env);
//.. roff = iselIntExpr_R(env, off);
//.. addInstr(env, mk_iMOVsd_RR(roff, tmp));
//.. if (bias != 0) {
//.. addInstr(env,
//.. X86Instr_Alu32R(Xalu_ADD, X86RMI_Imm(bias), tmp));
//.. }
//.. addInstr(env,
//.. X86Instr_Alu32R(Xalu_AND, X86RMI_Imm(7), tmp));
//.. vassert(elemSz == 1 || elemSz == 8);
//.. return
//.. X86AMode_IRRS( descr->base, hregX86_EBP(), tmp,
//.. elemSz==8 ? 3 : 0);
//.. }
/* Set FPU's rounding mode to the default */
static
void set_FPU_rounding_default ( ISelEnv* env )
{
HReg fr_src = newVRegF(env);
HReg r_srcHi = newVRegI(env);
HReg r_srcLo = newVRegI(env);
/* Default rounding mode = 0x0
Only supporting the rounding-mode bits - the rest of FPSCR is 0x0
- so we can set the whole register at once (faster)
*/
addInstr(env, mk_iMOVds_RRI(env, r_srcLo, PPC32RI_Imm(0x0)));
// r_srcHi = 0: upper 32 bits ignored by FpLdFPSCR
addInstr(env, mk_iMOVds_RRI(env, r_srcHi, PPC32RI_Imm(0x0)));
fr_src = mk_LoadRRtoFPR( env, r_srcHi, r_srcLo );
addInstr(env, PPC32Instr_FpLdFPSCR( fr_src ));
}
/* Convert IR rounding mode to PPC32 encoding */
static HReg roundModeIRtoPPC32 ( ISelEnv* env, HReg r_rmIR )
{
/*
rounding mode | PPC | IR
------------------------
to nearest | 00 | 00
to zero | 01 | 11
to +infinity | 10 | 10
to -infinity | 11 | 01
*/
HReg r_rmPPC32 = newVRegI(env);
HReg r_tmp = newVRegI(env);
// AND r_rmRI,3 -- shouldn't be needed; paranoia
addInstr(env, PPC32Instr_Alu32(Palu_AND, r_rmIR, r_rmIR, PPC32RI_Imm(3)));
// r_rmPPC32 = XOR( r_rmIR, (r_rmIR << 1) & 2)
addInstr(env, mk_sh32(env, Psh_SHL, r_tmp, r_rmIR, PPC32RI_Imm(1)));
addInstr(env, PPC32Instr_Alu32(Palu_AND, r_tmp, r_tmp, PPC32RI_Imm(2)));
addInstr(env, PPC32Instr_Alu32(Palu_XOR, r_rmPPC32, r_rmIR, PPC32RI_Reg(r_tmp)));
return r_rmPPC32;
}
/* Mess with the FPU's rounding mode: 'mode' is an I32-typed
expression denoting a value in the range 0 .. 3, indicating a round
mode encoded as per type IRRoundingMode. Set the PPC32 FPSCR to have
the same rounding.
For speed & simplicity, we're setting the *entire* FPSCR here.
*/
static
void set_FPU_rounding_mode ( ISelEnv* env, IRExpr* mode )
{
HReg fr_src = newVRegF(env);
HReg r_srcHi = newVRegI(env);
/* Only supporting the rounding-mode bits - the rest of FPSCR is 0x0
- so we can set the whole register at once (faster)
*/
// Resolve rounding mode and convert to PPC32 representation
HReg r_srcLo = roundModeIRtoPPC32( env, iselIntExpr_R(env, mode) );
// srcHi = 0: upper 32 bits ignored by FpLdFPSCR
addInstr(env, mk_iMOVds_RRI(env, r_srcHi, PPC32RI_Imm(0)));
// Load 2*I32 regs to fp reg:
fr_src = mk_LoadRRtoFPR( env, r_srcHi, r_srcLo );
// Move to FPSCR
addInstr(env, PPC32Instr_FpLdFPSCR( fr_src ));
}
//.. /* Generate !src into a new vector register, and be sure that the code
//.. is SSE1 compatible. Amazing that Intel doesn't offer a less crappy
//.. way to do this.
//.. */
//.. static HReg do_sse_Not128 ( ISelEnv* env, HReg src )
//.. {
//.. HReg dst = newVRegV(env);
//.. /* Set dst to zero. Not strictly necessary, but the idea of doing
//.. a FP comparison on whatever junk happens to be floating around
//.. in it is just too scary. */
//.. addInstr(env, X86Instr_SseReRg(Xsse_XOR, dst, dst));
//.. /* And now make it all 1s ... */
//.. addInstr(env, X86Instr_Sse32Fx4(Xsse_CMPEQF, dst, dst));
//.. /* Finally, xor 'src' into it. */
//.. addInstr(env, X86Instr_SseReRg(Xsse_XOR, src, dst));
//.. return dst;
//.. }
//.. /* Round an x87 FPU value to 53-bit-mantissa precision, to be used
//.. after most non-simple FPU operations (simple = +, -, *, / and
//.. sqrt).
//..
//.. This could be done a lot more efficiently if needed, by loading
//.. zero and adding it to the value to be rounded (fldz ; faddp?).
//.. */
//.. static void roundToF64 ( ISelEnv* env, HReg reg )
//.. {
//.. X86AMode* zero_esp = X86AMode_IR(0, hregX86_ESP());
//.. sub_from_esp(env, 8);
//.. addInstr(env, X86Instr_FpLdSt(False/*store*/, 8, reg, zero_esp));
//.. addInstr(env, X86Instr_FpLdSt(True/*load*/, 8, reg, zero_esp));
//.. add_to_esp(env, 8);
//.. }
/*---------------------------------------------------------*/
/*--- ISEL: Integer expressions (32/16/8 bit) ---*/
/*---------------------------------------------------------*/
/* Select insns for an integer-typed expression, and add them to the
code list. Return a reg holding the result. This reg will be a
virtual register. THE RETURNED REG MUST NOT BE MODIFIED. If you
want to modify it, ask for a new vreg, copy it in there, and modify
the copy. The register allocator will do its best to map both
vregs to the same real register, so the copies will often disappear
later in the game.
This should handle expressions of 32, 16 and 8-bit type. All
results are returned in a 32-bit register. For 16- and 8-bit
expressions, the upper 16/24 bits are arbitrary, so you should mask
or sign extend partial values if necessary.
*/
static HReg iselIntExpr_R ( ISelEnv* env, IRExpr* e )
{
HReg r = iselIntExpr_R_wrk(env, e);
/* sanity checks ... */
# if 0
vex_printf("\n"); ppIRExpr(e); vex_printf("\n");
# endif
vassert(hregClass(r) == HRcInt32);
vassert(hregIsVirtual(r));
return r;
}
/* DO NOT CALL THIS DIRECTLY ! */
static HReg iselIntExpr_R_wrk ( ISelEnv* env, IRExpr* e )
{
MatchInfo mi;
DECLARE_PATTERN(p_32to1_then_1Uto8);
IRType ty = typeOfIRExpr(env->type_env,e);
vassert(ty == Ity_I32 || Ity_I16 || Ity_I8);
switch (e->tag) {
/* --------- TEMP --------- */
case Iex_Tmp:
return lookupIRTemp(env, e->Iex.Tmp.tmp);
/* --------- LOAD --------- */
case Iex_LDle: {
HReg r_dst = newVRegI(env);
PPC32AMode* am_addr = iselIntExpr_AMode(env, e->Iex.LDle.addr);
if (ty == Ity_I8 || ty == Ity_I16 || ty == Ity_I32) {
addInstr(env, PPC32Instr_Load( sizeofIRType(ty), False, r_dst, am_addr ));
return r_dst;
}
break;
}
/* --------- BINARY OP --------- */
case Iex_Binop: {
PPC32AluOp aluOp;
PPC32ShiftOp shOp;
//.. /* Pattern: Sub32(0,x) */
//.. if (e->Iex.Binop.op == Iop_Sub32 && isZero32(e->Iex.Binop.arg1)) {
//.. HReg dst = newVRegI(env);
//.. HReg reg = iselIntExpr_R(env, e->Iex.Binop.arg2);
//.. addInstr(env, mk_iMOVsd_RR(reg,dst));
//.. addInstr(env, PPC32Instr_Unary32(Xun_NEG,PPC32RM_Reg(dst)));
//.. return dst;
//.. }
/* Is it an addition or logical style op? */
switch (e->Iex.Binop.op) {
case Iop_Add8: case Iop_Add16: case Iop_Add32:
aluOp = Palu_ADD; break;
case Iop_And8: case Iop_And16: case Iop_And32:
aluOp = Palu_AND; break;
case Iop_Or8: case Iop_Or16: case Iop_Or32:
aluOp = Palu_OR; break;
case Iop_Xor8: case Iop_Xor16: case Iop_Xor32:
aluOp = Palu_XOR; break;
default:
aluOp = Palu_INVALID; break;
}
/* For commutative ops we assume any literal
values are on the second operand. */
if (aluOp != Palu_INVALID) {
HReg r_dst = newVRegI(env);
HReg r_srcL = iselIntExpr_R(env, e->Iex.Binop.arg1);
PPC32RI* ri = iselIntExpr_RI(env, e->Iex.Binop.arg2);
PPC32RI* ri_srcR;
if (aluOp == Palu_ADD) {
ri_srcR = mk_FitRI16_S(env, ri );
} else {
ri_srcR = mk_FitRI16_U(env, ri);
}
addInstr(env, PPC32Instr_Alu32(aluOp, r_dst, r_srcL, ri_srcR));
return r_dst;
}
//.. /* Could do better here; forcing the first arg into a reg
//.. isn't always clever.
//.. -- t70 = Xor32(And32(Xor32(LDle:I32(Add32(t41,0xFFFFFFA0:I32)),
//.. LDle:I32(Add32(t41,0xFFFFFFA4:I32))),LDle:I32(Add32(
//.. t41,0xFFFFFFA8:I32))),LDle:I32(Add32(t41,0xFFFFFFA0:I32)))
//.. movl 0xFFFFFFA0(%vr41),%vr107
//.. movl 0xFFFFFFA4(%vr41),%vr108
//.. movl %vr107,%vr106
//.. xorl %vr108,%vr106
//.. movl 0xFFFFFFA8(%vr41),%vr109
//.. movl %vr106,%vr105
//.. andl %vr109,%vr105
//.. movl 0xFFFFFFA0(%vr41),%vr110
//.. movl %vr105,%vr104
//.. xorl %vr110,%vr104
//.. movl %vr104,%vr70
//.. */
/* Sub ? */
if (e->Iex.Binop.op == Iop_Sub8 ||
e->Iex.Binop.op == Iop_Sub16 ||
e->Iex.Binop.op == Iop_Sub32) {
HReg r_dst = newVRegI(env);
PPC32RI* riL = mk_FitRI16_S(env, iselIntExpr_RI(env, e->Iex.Binop.arg1));
HReg rR = iselIntExpr_R(env, e->Iex.Binop.arg2);
addInstr(env, PPC32Instr_Sub32(r_dst, riL, rR));
return r_dst;
}
/* How about a div? */
if (e->Iex.Binop.op == Iop_DivU32) {
HReg r_dst = newVRegI(env);
HReg r_srcL = iselIntExpr_R(env, e->Iex.Binop.arg1);
HReg r_srcR = iselIntExpr_R(env, e->Iex.Binop.arg2);
addInstr(env, PPC32Instr_Div(False, r_dst, r_srcL, r_srcR));
return r_dst;
}
if (e->Iex.Binop.op == Iop_DivS32) {
HReg r_dst = newVRegI(env);
HReg r_srcL = iselIntExpr_R(env, e->Iex.Binop.arg1);
HReg r_srcR = iselIntExpr_R(env, e->Iex.Binop.arg2);
addInstr(env, PPC32Instr_Div(True, r_dst, r_srcL, r_srcR));
return r_dst;
}
/* No? Anyone for a mul? */
if (e->Iex.Binop.op == Iop_Mul16 ||
e->Iex.Binop.op == Iop_Mul32) {
Bool syned = True;
HReg r_dst = newVRegI(env);
HReg r_srcL = iselIntExpr_R(env, e->Iex.Binop.arg1);
PPC32RI* ri_srcR = mk_FitRI16_S(env, iselIntExpr_RI(env, e->Iex.Binop.arg2));
addInstr(env, PPC32Instr_MulL(syned, 0, r_dst, r_srcL, ri_srcR));
return r_dst;
}
/* Perhaps a shift op? */
switch (e->Iex.Binop.op) {
case Iop_Shl32: case Iop_Shl16: case Iop_Shl8:
shOp = Psh_SHL; break;
case Iop_Shr32: case Iop_Shr16: case Iop_Shr8:
shOp = Psh_SHR; break;
case Iop_Sar32: case Iop_Sar16: case Iop_Sar8:
shOp = Psh_SAR; break;
default:
shOp = Psh_INVALID; break;
}
if (shOp != Psh_INVALID) {
HReg r_dst = newVRegI(env);
/* regL = the value to be shifted */
HReg r_src = iselIntExpr_R(env, e->Iex.Binop.arg1);
/* Do any necessary widening for 16/8 bit operands */
switch (e->Iex.Binop.op) {
case Iop_Shr8:
addInstr(env, PPC32Instr_Alu32(Palu_AND, r_dst, r_dst, PPC32RI_Imm(0xFF)));
break;
case Iop_Shr16:
addInstr(env, PPC32Instr_Alu32(Palu_AND, r_dst, r_dst, PPC32RI_Imm(0xFFFF)));
break;
case Iop_Sar8:
addInstr(env, mk_sh32(env, Psh_SHL, r_dst, r_dst, PPC32RI_Imm(24)));
addInstr(env, mk_sh32(env, Psh_SAR, r_dst, r_dst, PPC32RI_Imm(24)));
break;
case Iop_Sar16:
addInstr(env, mk_sh32(env, Psh_SHL, r_dst, r_dst, PPC32RI_Imm(16)));
addInstr(env, mk_sh32(env, Psh_SAR, r_dst, r_dst, PPC32RI_Imm(16)));
break;
default: break;
}
/* Now consider the shift amount. If it's a small literal, we
can do a much better job than the general case. */
if (e->Iex.Binop.arg2->tag == Iex_Const &&
e->Iex.Binop.arg2->Iex.Const.con->Ico.U8 < 32) {
/* assert that the IR is well-typed */
Int imm_shft;
vassert(e->Iex.Binop.arg2->Iex.Const.con->tag == Ico_U8);
imm_shft = e->Iex.Binop.arg2->Iex.Const.con->Ico.U8;
vassert(imm_shft >= 0);
if (imm_shft > 0)
addInstr(env, mk_sh32(env, shOp, r_dst, r_src, PPC32RI_Imm(imm_shft)));
} else {
/* General case; we have to force the amount into %cl. */
HReg r_shft = iselIntExpr_R(env, e->Iex.Binop.arg2);
addInstr(env, mk_sh32(env, shOp, r_dst, r_src, PPC32RI_Reg(r_shft)));
}
return r_dst;
}
/* Handle misc other ops. */
if (e->Iex.Binop.op == Iop_8HLto16) {
HReg hi8 = newVRegI(env);
HReg lo8 = newVRegI(env);
HReg hi8s = iselIntExpr_R(env, e->Iex.Binop.arg1);
HReg lo8s = iselIntExpr_R(env, e->Iex.Binop.arg2);
addInstr(env, mk_sh32(env, Psh_SHL, hi8, hi8s, PPC32RI_Imm(8)));
addInstr(env, PPC32Instr_Alu32(Palu_AND, lo8, lo8s, PPC32RI_Imm(0xFF)));
addInstr(env, PPC32Instr_Alu32(Palu_OR, hi8, hi8, PPC32RI_Reg(lo8)));
return hi8;
}
if (e->Iex.Binop.op == Iop_16HLto32) {
HReg hi16 = newVRegI(env);
HReg lo16 = newVRegI(env);
HReg hi16s = iselIntExpr_R(env, e->Iex.Binop.arg1);
HReg lo16s = iselIntExpr_R(env, e->Iex.Binop.arg2);
addInstr(env, mk_sh32(env, Psh_SHL, hi16, hi16s, PPC32RI_Imm(16)));
addInstr(env, PPC32Instr_Alu32(Palu_AND, lo16, lo16s, PPC32RI_Imm(0xFFFF)));
addInstr(env, PPC32Instr_Alu32(Palu_OR, hi16, hi16, PPC32RI_Reg(lo16)));
return hi16;
}
//.. if (e->Iex.Binop.op == Iop_MullS16 || e->Iex.Binop.op == Iop_MullS8
//.. || e->Iex.Binop.op == Iop_MullU16 || e->Iex.Binop.op == Iop_MullU8) {
//.. HReg a16 = newVRegI(env);
//.. HReg b16 = newVRegI(env);
//.. HReg a16s = iselIntExpr_R(env, e->Iex.Binop.arg1);
//.. HReg b16s = iselIntExpr_R(env, e->Iex.Binop.arg2);
//.. Int shift = (e->Iex.Binop.op == Iop_MullS8
//.. || e->Iex.Binop.op == Iop_MullU8)
//.. ? 24 : 16;
//.. X86ShiftOp shr_op = (e->Iex.Binop.op == Iop_MullS8
//.. || e->Iex.Binop.op == Iop_MullS16)
//.. ? Xsh_SAR : Xsh_SHR;
//..
//.. addInstr(env, mk_iMOVsd_RR(a16s, a16));
//.. addInstr(env, mk_iMOVsd_RR(b16s, b16));
//.. addInstr(env, X86Instr_Sh32(Xsh_SHL, shift, X86RM_Reg(a16)));
//.. addInstr(env, X86Instr_Sh32(Xsh_SHL, shift, X86RM_Reg(b16)));
//.. addInstr(env, X86Instr_Sh32(shr_op, shift, X86RM_Reg(a16)));
//.. addInstr(env, X86Instr_Sh32(shr_op, shift, X86RM_Reg(b16)));
//.. addInstr(env, X86Instr_Alu32R(Xalu_MUL, X86RMI_Reg(a16), b16));
//.. return b16;
//.. }
if (e->Iex.Binop.op == Iop_CmpF64) {
HReg fr_srcL = iselDblExpr(env, e->Iex.Binop.arg1);
HReg fr_srcR = iselDblExpr(env, e->Iex.Binop.arg2);
HReg r_ccPPC32 = newVRegI(env);
HReg r_ccIR = newVRegI(env);
HReg r_ccIR_b0 = newVRegI(env);
HReg r_ccIR_b2 = newVRegI(env);
HReg r_ccIR_b6 = newVRegI(env);
addInstr(env, PPC32Instr_FpCmp(r_ccPPC32, fr_srcL, fr_srcR));
/* Map compare result from PPC32 to IR,
conforming to CmpF64 definition. */
/*
FP cmp result | PPC | IR
--------------------------
UN | 0x1 | 0x45
EQ | 0x2 | 0x40
GT | 0x4 | 0x00
LT | 0x8 | 0x01
*/
// r_ccIR_b0 = r_ccPPC32[0] || r_ccPPC32[3]
addInstr(env, mk_sh32(env, Psh_SHR, r_ccIR_b0, r_ccPPC32, PPC32RI_Imm(0x3)));
addInstr(env, PPC32Instr_Alu32(Palu_OR, r_ccIR_b0, r_ccPPC32, PPC32RI_Reg(r_ccIR_b0)));
addInstr(env, PPC32Instr_Alu32(Palu_AND, r_ccIR_b0, r_ccIR_b0, PPC32RI_Imm(0x1)));
// r_ccIR_b2 = r_ccPPC32[0]
addInstr(env, mk_sh32(env, Psh_SHL, r_ccIR_b2, r_ccPPC32, PPC32RI_Imm(0x2)));
addInstr(env, PPC32Instr_Alu32(Palu_AND, r_ccIR_b2, r_ccIR_b2, PPC32RI_Imm(0x4)));
// r_ccIR_b6 = r_ccPPC32[0] || r_ccPPC32[1]
addInstr(env, mk_sh32(env, Psh_SHR, r_ccIR_b6, r_ccPPC32, PPC32RI_Imm(0x1)));
addInstr(env, PPC32Instr_Alu32(Palu_OR, r_ccIR_b6, r_ccPPC32, PPC32RI_Reg(r_ccIR_b6)));
addInstr(env, mk_sh32(env, Psh_SHL, r_ccIR_b6, r_ccIR_b6, PPC32RI_Imm(0x6)));
addInstr(env, PPC32Instr_Alu32(Palu_AND, r_ccIR_b6, r_ccIR_b6, PPC32RI_Imm(0x40)));
// r_ccIR = r_ccIR_b0 || r_ccIR_b2 || r_ccIR_b6
addInstr(env, PPC32Instr_Alu32(Palu_OR, r_ccIR, r_ccIR_b0, PPC32RI_Reg(r_ccIR_b2)));
addInstr(env, PPC32Instr_Alu32(Palu_OR, r_ccIR, r_ccIR, PPC32RI_Reg(r_ccIR_b6)));
return r_ccIR;
}
if (e->Iex.Binop.op == Iop_F64toI32) {
//.. || e->Iex.Binop.op == Iop_F64toI16
HReg fr_src = iselDblExpr(env, e->Iex.Binop.arg2);
HReg r_dst = newVRegI(env);
/* Set host rounding mode */
set_FPU_rounding_mode( env, e->Iex.Binop.arg1 );
sub_from_sp( env, 16 );
addInstr(env, PPC32Instr_FpF64toI32(r_dst, fr_src));
add_to_sp( env, 16 );
/* Restore default FPU rounding. */
set_FPU_rounding_default( env );
return r_dst;
}
//.. /* C3210 flags following FPU partial remainder (fprem), both
//.. IEEE compliant (PREM1) and non-IEEE compliant (PREM). */
//.. if (e->Iex.Binop.op == Iop_PRemC3210F64
//.. || e->Iex.Binop.op == Iop_PRem1C3210F64) {
//.. HReg junk = newVRegF(env);
//.. HReg dst = newVRegI(env);
//.. HReg srcL = iselDblExpr(env, e->Iex.Binop.arg1);
//.. HReg srcR = iselDblExpr(env, e->Iex.Binop.arg2);
//.. addInstr(env, X86Instr_FpBinary(
//.. e->Iex.Binop.op==Iop_PRemC3210F64
//.. ? Xfp_PREM : Xfp_PREM1,
//.. srcL,srcR,junk
//.. ));
//.. /* The previous pseudo-insn will have left the FPU's C3210
//.. flags set correctly. So bag them. */
//.. addInstr(env, X86Instr_FpStSW_AX());
//.. addInstr(env, mk_iMOVsd_RR(hregX86_EAX(), dst));
//.. addInstr(env, X86Instr_Alu32R(Xalu_AND, X86RMI_Imm(0x4700), dst));
//.. return dst;
//.. }
break;
}
/* --------- UNARY OP --------- */
case Iex_Unop: {
/* 1Uto8(32to1(expr32)) */
DEFINE_PATTERN(p_32to1_then_1Uto8,
unop(Iop_1Uto8,unop(Iop_32to1,bind(0))));
if (matchIRExpr(&mi,p_32to1_then_1Uto8,e)) {
IRExpr* expr32 = mi.bindee[0];
HReg r_dst = newVRegI(env);
HReg r_src = iselIntExpr_R(env, expr32);
addInstr(env, PPC32Instr_Alu32(Palu_AND, r_dst, r_src, PPC32RI_Imm(1)));
return r_dst;
}
/* 16Uto32(LDle(expr32)) */
{
DECLARE_PATTERN(p_LDle16_then_16Uto32);
DEFINE_PATTERN(p_LDle16_then_16Uto32,
unop(Iop_16Uto32,IRExpr_LDle(Ity_I16,bind(0))) );
if (matchIRExpr(&mi,p_LDle16_then_16Uto32,e)) {
HReg r_dst = newVRegI(env);
PPC32AMode* amode = iselIntExpr_AMode ( env, mi.bindee[0] );
addInstr(env, PPC32Instr_Load(2,False,r_dst,amode));
return r_dst;
}
}
switch (e->Iex.Unop.op) {
case Iop_8Uto16:
case Iop_8Uto32:
case Iop_16Uto32: {
HReg r_dst = newVRegI(env);
HReg r_src = iselIntExpr_R(env, e->Iex.Unop.arg);
UInt mask = e->Iex.Unop.op==Iop_16Uto32 ? 0xFFFF : 0xFF;
addInstr(env, PPC32Instr_Alu32(Palu_AND,r_dst,r_src,PPC32RI_Imm(mask)));
return r_dst;
}
case Iop_8Sto16:
case Iop_8Sto32:
case Iop_16Sto32: {
HReg r_dst = newVRegI(env);
HReg r_src = iselIntExpr_R(env, e->Iex.Unop.arg);
UInt amt = e->Iex.Unop.op==Iop_16Sto32 ? 16 : 24;
addInstr(env, mk_sh32(env, Psh_SHL, r_dst, r_src, PPC32RI_Imm(amt)));
addInstr(env, mk_sh32(env, Psh_SAR, r_dst, r_dst, PPC32RI_Imm(amt)));
return r_dst;
}
case Iop_Not8:
case Iop_Not16:
case Iop_Not32: {
HReg r_dst = newVRegI(env);
HReg r_src = iselIntExpr_R(env, e->Iex.Unop.arg);
addInstr(env, PPC32Instr_Unary32(Pun_NOT,r_dst,r_src));
return r_dst;
}
case Iop_64HIto32: {
HReg rHi, rLo;
iselInt64Expr(&rHi,&rLo, env, e->Iex.Unop.arg);
return rHi; /* and abandon rLo .. poor wee thing :-) */
}
case Iop_64to32: {
#if 0
/* 64to32(MullS32(expr,expr)) */
{
DECLARE_PATTERN(p_MullS32_then_64to32);
DEFINE_PATTERN(p_MullS32_then_64to32,
unop(Iop_64to32,
binop(Iop_MullS32, bind(0), bind(1))));
if (matchIRExpr(&mi,p_MullS32_then_64to32,e)) {
HReg r_dst = newVRegI(env);
HReg r_srcL = iselIntExpr_R( env, mi.bindee[0] );
PPC32RI* ri_srcR = mk_FitRI16_S(env, iselIntExpr_RI( env, mi.bindee[1] ));
addInstr(env, PPC32Instr_MulL(True, 0, r_dst, r_srcL, ri_srcR));
return r_dst;
}
}
/* 64to32(MullU32(expr,expr)) */
{
DECLARE_PATTERN(p_MullU32_then_64to32);
DEFINE_PATTERN(p_MullU32_then_64to32,
unop(Iop_64to32,
binop(Iop_MullU32, bind(0), bind(1))));
if (matchIRExpr(&mi,p_MullU32_then_64to32,e)) {
HReg r_dst = newVRegI(env);
HReg r_srcL = iselIntExpr_R( env, mi.bindee[0] );
PPC32RI* ri_srcR = mk_FitRI16_S(env, iselIntExpr_RI( env, mi.bindee[1] ));
addInstr(env, PPC32Instr_MulL(False, 0, r_dst, r_srcL, ri_srcR));
return r_dst;
}
}
// CAB: Also: 64HIto32(MullU32(expr,expr))
// CAB: Also: 64HIto32(MullS32(expr,expr))
#endif
HReg rHi, rLo;
iselInt64Expr(&rHi,&rLo, env, e->Iex.Unop.arg);
return rLo; /* similar stupid comment to the above ... */
}
case Iop_16HIto8:
case Iop_32HIto16: {
HReg r_dst = newVRegI(env);
HReg r_src = iselIntExpr_R(env, e->Iex.Unop.arg);
UInt shift = e->Iex.Unop.op == Iop_16HIto8 ? 8 : 16;
addInstr(env, mk_sh32(env, Psh_SHR, r_dst, r_src, PPC32RI_Imm(shift)));
return r_dst;
}
case Iop_1Uto32:
case Iop_1Uto8: {
HReg r_dst = newVRegI(env);
PPC32CondCode cond = iselCondCode(env, e->Iex.Unop.arg);
addInstr(env, PPC32Instr_Set32(cond,r_dst));
return r_dst;
}
case Iop_1Sto8:
case Iop_1Sto16:
case Iop_1Sto32: {
/* could do better than this, but for now ... */
HReg r_dst = newVRegI(env);
PPC32CondCode cond = iselCondCode(env, e->Iex.Unop.arg);
addInstr(env, PPC32Instr_Set32(cond,r_dst));
addInstr(env, mk_sh32(env, Psh_SHL, r_dst, r_dst, PPC32RI_Imm(31)));
addInstr(env, mk_sh32(env, Psh_SAR, r_dst, r_dst, PPC32RI_Imm(31)));
return r_dst;
}
//.. case Iop_Ctz32: {
//.. /* Count trailing zeroes, implemented by x86 'bsfl' */
//.. HReg dst = newVRegI(env);
//.. HReg src = iselIntExpr_R(env, e->Iex.Unop.arg);
//.. addInstr(env, X86Instr_Bsfr32(True,src,dst));
//.. return dst;
//.. }
case Iop_Clz32: {
/* Count leading zeroes. */
HReg r_dst = newVRegI(env);
HReg r_src = iselIntExpr_R(env, e->Iex.Unop.arg);
addInstr(env, PPC32Instr_Unary32(Pun_CLZ,r_dst,r_src));
return r_dst;
}
case Iop_Neg8:
case Iop_Neg16:
case Iop_Neg32: {
HReg r_dst = newVRegI(env);
HReg r_src = iselIntExpr_R(env, e->Iex.Unop.arg);
addInstr(env, PPC32Instr_Unary32(Pun_NEG,r_dst,r_src));
return r_dst;
}
//.. case Iop_V128to32: {
//.. HReg dst = newVRegI(env);
//.. HReg vec = iselVecExpr(env, e->Iex.Unop.arg);
//.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP());
//.. sub_from_esp(env, 16);
//.. addInstr(env, X86Instr_SseLdSt(False/*store*/, vec, esp0));
//.. addInstr(env, X86Instr_Alu32R( Xalu_MOV, X86RMI_Mem(esp0), dst ));
//.. add_to_esp(env, 16);
//.. return dst;
//.. }
case Iop_16to8:
case Iop_32to8:
case Iop_32to16:
/* These are no-ops. */
return iselIntExpr_R(env, e->Iex.Unop.arg);
default:
break;
}
break;
}
/* --------- GET --------- */
case Iex_Get: {
if (ty == Ity_I8 || ty == Ity_I16 || ty == Ity_I32) {
HReg r_dst = newVRegI(env);
PPC32AMode* am_addr = PPC32AMode_IR(e->Iex.Get.offset, GuestStatePtr );
addInstr(env, PPC32Instr_Load( sizeofIRType(ty), False, r_dst, am_addr ));
return r_dst;
}
break;
}
//.. case Iex_GetI: {
//.. X86AMode* am
//.. = genGuestArrayOffset(
//.. env, e->Iex.GetI.descr,
//.. e->Iex.GetI.ix, e->Iex.GetI.bias );
//.. HReg dst = newVRegI(env);
//.. if (ty == Ity_I8) {
//.. addInstr(env, X86Instr_Load( 1, False, am, dst ));
//.. return dst;
//.. }
//.. break;
//.. }
/* --------- CCALL --------- */
case Iex_CCall: {
HReg r_dst = newVRegI(env);
vassert(ty == Ity_I32);
/* be very restrictive for now. Only 32/64-bit ints allowed
for args, and 32 bits for return type. */
if (e->Iex.CCall.retty != Ity_I32)
goto irreducible;
/* Marshal args, do the call, clear stack. */
doHelperCall( env, False, NULL, e->Iex.CCall.cee, e->Iex.CCall.args );
/* GPR3 now holds the destination address from Pin_Goto */
addInstr(env, mk_iMOVds_RR(r_dst, hregPPC32_GPR3()));
return r_dst;
}
/* --------- LITERAL --------- */
/* 32/16/8-bit literals */
case Iex_Const: {
HReg r_dst = newVRegI(env);
addInstr(env, mk_iMOVds_RRI(env, r_dst, iselIntExpr_RI ( env, e )));
return r_dst;
}
/* --------- MULTIPLEX --------- */
case Iex_Mux0X: {
if ((ty == Ity_I32 || ty == Ity_I16 || ty == Ity_I8)
&& typeOfIRExpr(env->type_env,e->Iex.Mux0X.cond) == Ity_I8) {
PPC32CondCode cc = mk_PPCCondCode( Pct_TRUE, Pcf_EQ );
HReg r_cond = iselIntExpr_R(env, e->Iex.Mux0X.cond);
HReg rX = iselIntExpr_R(env, e->Iex.Mux0X.exprX);
PPC32RI* r0 = iselIntExpr_RI(env, e->Iex.Mux0X.expr0);
HReg r_dst = newVRegI(env);
addInstr(env, mk_iMOVds_RR(r_dst,rX));
addInstr(env, PPC32Instr_Cmp32(Pcmp_U, 7, r_cond, PPC32RI_Imm(0)));
addInstr(env, PPC32Instr_CMov32(cc,r_dst,r0));
return r_dst;
}
break;
}
default:
break;
} /* switch (e->tag) */
/* We get here if no pattern matched. */
irreducible:
ppIRExpr(e);
vpanic("iselIntExpr_R(ppc32): cannot reduce tree");
}
/*---------------------------------------------------------*/
/*--- ISEL: Integer expression auxiliaries ---*/
/*---------------------------------------------------------*/
/* --------------------- AMODEs --------------------- */
/* Return an AMode which computes the value of the specified
expression, possibly also adding insns to the code list as a
result. The expression may only be a 32-bit one.
*/
static Bool sane_AMode ( PPC32AMode* am )
{
switch (am->tag) {
case Pam_IR:
return (hregClass(am->Pam.IR.base) == HRcInt32
&& hregIsVirtual(am->Pam.IR.base)
&& (am->Pam.IR.index < 0x10000));
case Pam_RR:
return (hregClass(am->Pam.RR.base) == HRcInt32
&& hregIsVirtual(am->Pam.IR.base)
&& hregClass(am->Pam.RR.base) == HRcInt32
&& hregIsVirtual(am->Pam.IR.base));
default:
vpanic("sane_AMode: unknown ppc32 amode tag");
}
}
static PPC32AMode* iselIntExpr_AMode ( ISelEnv* env, IRExpr* e )
{
PPC32AMode* am = iselIntExpr_AMode_wrk(env, e);
vassert(sane_AMode(am));
return am;
}
/* DO NOT CALL THIS DIRECTLY ! */
static PPC32AMode* iselIntExpr_AMode_wrk ( ISelEnv* env, IRExpr* e )
{
IRType ty = typeOfIRExpr(env->type_env,e);
vassert(ty == Ity_I32);
/* Add32(expr,i), where i<0x10000 */
if (e->tag == Iex_Binop
&& e->Iex.Binop.op == Iop_Add32
&& e->Iex.Binop.arg2->tag == Iex_Const
&& e->Iex.Binop.arg2->Iex.Const.con->tag == Ico_U32
&& e->Iex.Binop.arg2->Iex.Const.con->Ico.U32 < 0x10000) {
return PPC32AMode_IR(e->Iex.Binop.arg2->Iex.Const.con->Ico.U32,
iselIntExpr_R(env, e->Iex.Binop.arg1));
}
/* Add32(expr,expr) */
if (e->tag == Iex_Binop
&& e->Iex.Binop.op == Iop_Add32) {
HReg r_base = iselIntExpr_R(env, e->Iex.Binop.arg1);
HReg r_idx = iselIntExpr_R(env, e->Iex.Binop.arg2);
return PPC32AMode_RR(r_idx, r_base);
}
/* Doesn't match anything in particular. Generate it into
a register and use that. */
{
HReg r1 = iselIntExpr_R(env, e);
return PPC32AMode_IR(0, r1);
}
}
/* --------------------- RIs --------------------- */
/* Calculate an expression into an PPC32RI operand. As with
iselIntExpr_R, the expression can have type 32, 16 or 8 bits. */
static PPC32RI* iselIntExpr_RI ( ISelEnv* env, IRExpr* e )
{
PPC32RI* ri = iselIntExpr_RI_wrk(env, e);
/* sanity checks ... */
switch (ri->tag) {
case Pri_Imm:
return ri;
case Pri_Reg:
vassert(hregClass(ri->Pri.Reg.reg) == HRcInt32);
vassert(hregIsVirtual(ri->Pri.Reg.reg));
return ri;
default:
vpanic("iselIntExpr_RI: unknown ppc32 RI tag");
}
}
/* DO NOT CALL THIS DIRECTLY ! */
static PPC32RI* iselIntExpr_RI_wrk ( ISelEnv* env, IRExpr* e )
{
IRType ty = typeOfIRExpr(env->type_env,e);
vassert(ty == Ity_I32 || ty == Ity_I16 || ty == Ity_I8);
/* special case: immediate */
if (e->tag == Iex_Const) {
UInt u;
switch (e->Iex.Const.con->tag) {
case Ico_U32: u = e->Iex.Const.con->Ico.U32; break;
case Ico_U16: u = 0xFFFF & (e->Iex.Const.con->Ico.U16); break;
case Ico_U8: u = 0xFF & (e->Iex.Const.con->Ico.U8); break;
default: vpanic("iselIntExpr_RMI.Iex_Const(ppc32h)");
}
return PPC32RI_Imm(u);
}
/* default case: calculate into a register and return that */
{
HReg r = iselIntExpr_R ( env, e );
return PPC32RI_Reg(r);
}
}
/* --------------------- CONDCODE --------------------- */
/* Generate code to evaluated a bit-typed expression, returning the
condition code which would correspond when the expression would
notionally have returned 1. */
static PPC32CondCode iselCondCode ( ISelEnv* env, IRExpr* e )
{
/* Uh, there's nothing we can sanity check here, unfortunately. */
return iselCondCode_wrk(env,e);
}
/* DO NOT CALL THIS DIRECTLY ! */
static PPC32CondCode iselCondCode_wrk ( ISelEnv* env, IRExpr* e )
{
MatchInfo mi;
DECLARE_PATTERN(p_32to1);
//.. DECLARE_PATTERN(p_1Uto32_then_32to1);
//.. DECLARE_PATTERN(p_1Sto32_then_32to1);
vassert(e);
vassert(typeOfIRExpr(env->type_env,e) == Ity_I1);
/* Constant 1:Bit */
if (e->tag == Iex_Const && e->Iex.Const.con->Ico.U1 == True) {
// Make a compare that will always be true:
PPC32RI* ri_one = PPC32RI_Imm(1);
HReg r_one = newVRegI(env);
addInstr(env, mk_iMOVds_RRI(env, r_one, ri_one));
addInstr(env, PPC32Instr_Cmp32(Pcmp_U, 7, r_one, ri_one));
return mk_PPCCondCode( Pct_TRUE, Pcf_EQ );
}
/* Not1(...) */
if (e->tag == Iex_Unop && e->Iex.Unop.op == Iop_Not1) {
/* Generate code for the arg, and negate the test condition */
PPC32CondCode cond = iselCondCode(env, e->Iex.Unop.arg);
cond.test = invertCondTest(cond.test);
return cond;
}
/* --- patterns rooted at: 32to1 --- */
//.. /* 32to1(1Uto32(expr1)) -- the casts are pointless, ignore them */
//.. DEFINE_PATTERN(p_1Uto32_then_32to1,
//.. unop(Iop_32to1,unop(Iop_1Uto32,bind(0))));
//.. if (matchIRExpr(&mi,p_1Uto32_then_32to1,e)) {
//.. IRExpr* expr1 = mi.bindee[0];
//.. return iselCondCode(env, expr1);
//.. }
//..
//.. /* 32to1(1Sto32(expr1)) -- the casts are pointless, ignore them */
//.. DEFINE_PATTERN(p_1Sto32_then_32to1,
//.. unop(Iop_32to1,unop(Iop_1Sto32,bind(0))));
//.. if (matchIRExpr(&mi,p_1Sto32_then_32to1,e)) {
//.. IRExpr* expr1 = mi.bindee[0];
//.. return iselCondCode(env, expr1);
//.. }
/* 32to1(expr32) */
DEFINE_PATTERN(p_32to1, unop(Iop_32to1,bind(0)));
if (matchIRExpr(&mi,p_32to1,e)) {
HReg r_dst = iselIntExpr_R(env, mi.bindee[0]);
addInstr(env, PPC32Instr_Cmp32(Pcmp_U, 7, r_dst, PPC32RI_Imm(1)));
return mk_PPCCondCode( Pct_TRUE, Pcf_EQ );
}
/* --- patterns rooted at: CmpNEZ8 --- */
/* CmpNEZ8(x) */
if (e->tag == Iex_Unop
&& e->Iex.Unop.op == Iop_CmpNEZ8) {
HReg r_32 = iselIntExpr_R(env, e->Iex.Unop.arg);
HReg r_l = newVRegI(env);
addInstr(env, PPC32Instr_Alu32(Palu_AND, r_l, r_32, PPC32RI_Imm(0xFF)));
addInstr(env, PPC32Instr_Cmp32(Pcmp_S, 7, r_l, PPC32RI_Imm(0)));
return mk_PPCCondCode( Pct_FALSE, Pcf_EQ );
}
/* --- patterns rooted at: CmpNEZ32 --- */
/* CmpNEZ32(x) */
if (e->tag == Iex_Unop
&& e->Iex.Unop.op == Iop_CmpNEZ32) {
HReg r1 = iselIntExpr_R(env, e->Iex.Unop.arg);
addInstr(env, PPC32Instr_Cmp32(Pcmp_S, 7, r1, PPC32RI_Imm(0)));
return mk_PPCCondCode( Pct_FALSE, Pcf_EQ );
}
/* --- patterns rooted at: Cmp{EQ,NE}{8,16} --- */
//.. /* CmpEQ8 / CmpNE8 */
//.. if (e->tag == Iex_Binop
//.. && (e->Iex.Binop.op == Iop_CmpEQ8
//.. || e->Iex.Binop.op == Iop_CmpNE8)) {
//.. HReg r1 = iselIntExpr_R(env, e->Iex.Binop.arg1);
//.. X86RMI* rmi2 = iselIntExpr_RMI(env, e->Iex.Binop.arg2);
//.. HReg r = newVRegI(env);
//.. addInstr(env, mk_iMOVsd_RR(r1,r));
//.. addInstr(env, X86Instr_Alu32R(Xalu_XOR,rmi2,r));
//.. addInstr(env, X86Instr_Alu32R(Xalu_AND,X86RMI_Imm(0xFF),r));
//.. switch (e->Iex.Binop.op) {
//.. case Iop_CmpEQ8: return Xcc_Z;
//.. case Iop_CmpNE8: return Xcc_NZ;
//.. default: vpanic("iselCondCode(x86): CmpXX8");
//.. }
//.. }
//..
//.. /* CmpEQ16 / CmpNE16 */
//.. if (e->tag == Iex_Binop
//.. && (e->Iex.Binop.op == Iop_CmpEQ16
//.. || e->Iex.Binop.op == Iop_CmpNE16)) {
//.. HReg r1 = iselIntExpr_R(env, e->Iex.Binop.arg1);
//.. X86RMI* rmi2 = iselIntExpr_RMI(env, e->Iex.Binop.arg2);
//.. HReg r = newVRegI(env);
//.. addInstr(env, mk_iMOVsd_RR(r1,r));
//.. addInstr(env, X86Instr_Alu32R(Xalu_XOR,rmi2,r));
//.. addInstr(env, X86Instr_Alu32R(Xalu_AND,X86RMI_Imm(0xFFFF),r));
//.. switch (e->Iex.Binop.op) {
//.. case Iop_CmpEQ16: return Xcc_Z;
//.. case Iop_CmpNE16: return Xcc_NZ;
//.. default: vpanic("iselCondCode(x86): CmpXX16");
//.. }
//.. }
//..
//.. /* CmpNE32(1Sto32(b), 0) ==> b */
//.. {
//.. DECLARE_PATTERN(p_CmpNE32_1Sto32);
//.. DEFINE_PATTERN(
//.. p_CmpNE32_1Sto32,
//.. binop(Iop_CmpNE32, unop(Iop_1Sto32,bind(0)), mkU32(0)));
//.. if (matchIRExpr(&mi, p_CmpNE32_1Sto32, e)) {
//.. return iselCondCode(env, mi.bindee[0]);
//.. }
//.. }
/* Cmp*32*(x,y) */
if (e->tag == Iex_Binop
&& (e->Iex.Binop.op == Iop_CmpEQ32
|| e->Iex.Binop.op == Iop_CmpNE32
|| e->Iex.Binop.op == Iop_CmpLT32S
|| e->Iex.Binop.op == Iop_CmpLT32U
|| e->Iex.Binop.op == Iop_CmpLE32S
|| e->Iex.Binop.op == Iop_CmpLE32U)) {
HReg r1 = iselIntExpr_R(env, e->Iex.Binop.arg1);
PPC32RI* ri2 = iselIntExpr_RI(env, e->Iex.Binop.arg2);
PPC32CmpOp cmp_op = Pcmp_U;
if (e->Iex.Binop.op == Iop_CmpLT32S ||
e->Iex.Binop.op == Iop_CmpLE32S) {
cmp_op = Pcmp_S;
}
if (cmp_op == Pcmp_S) {
addInstr(env, PPC32Instr_Cmp32(cmp_op,7,r1,mk_FitRI16_S(env, ri2)));
} else {
addInstr(env, PPC32Instr_Cmp32(cmp_op,7,r1,mk_FitRI16_U(env, ri2)));
}
switch (e->Iex.Binop.op) {
case Iop_CmpEQ32: return mk_PPCCondCode( Pct_TRUE, Pcf_EQ );
case Iop_CmpNE32: return mk_PPCCondCode( Pct_FALSE, Pcf_EQ );
case Iop_CmpLT32S: return mk_PPCCondCode( Pct_TRUE, Pcf_LT );
case Iop_CmpLT32U: return mk_PPCCondCode( Pct_TRUE, Pcf_LT );
case Iop_CmpLE32S: return mk_PPCCondCode( Pct_FALSE, Pcf_GT );
case Iop_CmpLE32U: return mk_PPCCondCode( Pct_FALSE, Pcf_GT );
default: vpanic("iselCondCode(ppc32): CmpXX32");
}
}
//.. /* CmpNE64(1Sto64(b), 0) ==> b */
//.. {
//.. DECLARE_PATTERN(p_CmpNE64_1Sto64);
//.. DEFINE_PATTERN(
//.. p_CmpNE64_1Sto64,
//.. binop(Iop_CmpNE64, unop(Iop_1Sto64,bind(0)), mkU64(0)));
//.. if (matchIRExpr(&mi, p_CmpNE64_1Sto64, e)) {
//.. return iselCondCode(env, mi.bindee[0]);
//.. }
//.. }
//..
//.. /* CmpNE64(x, 0) */
//.. {
//.. DECLARE_PATTERN(p_CmpNE64_x_zero);
//.. DEFINE_PATTERN(
//.. p_CmpNE64_x_zero,
//.. binop(Iop_CmpNE64, bind(0), mkU64(0)) );
//.. if (matchIRExpr(&mi, p_CmpNE64_x_zero, e)) {
//.. HReg hi, lo;
//.. IRExpr* x = mi.bindee[0];
//.. HReg tmp = newVRegI(env);
//.. iselInt64Expr( &hi, &lo, env, x );
//.. addInstr(env, mk_iMOVsd_RR(hi, tmp));
//.. addInstr(env, X86Instr_Alu32R(Xalu_OR,X86RMI_Reg(lo), tmp));
//.. return Xcc_NZ;
//.. }
//.. }
//..
//.. /* CmpNE64 */
//.. if (e->tag == Iex_Binop
//.. && e->Iex.Binop.op == Iop_CmpNE64) {
//.. HReg hi1, hi2, lo1, lo2;
//.. HReg tHi = newVRegI(env);
//.. HReg tLo = newVRegI(env);
//.. iselInt64Expr( &hi1, &lo1, env, e->Iex.Binop.arg1 );
//.. iselInt64Expr( &hi2, &lo2, env, e->Iex.Binop.arg2 );
//.. addInstr(env, mk_iMOVsd_RR(hi1, tHi));
//.. addInstr(env, X86Instr_Alu32R(Xalu_XOR,X86RMI_Reg(hi2), tHi));
//.. addInstr(env, mk_iMOVsd_RR(lo1, tLo));
//.. addInstr(env, X86Instr_Alu32R(Xalu_XOR,X86RMI_Reg(lo2), tLo));
//.. addInstr(env, X86Instr_Alu32R(Xalu_OR,X86RMI_Reg(tHi), tLo));
//.. switch (e->Iex.Binop.op) {
//.. case Iop_CmpNE64: return Xcc_NZ;
//.. default: vpanic("iselCondCode(x86): CmpXX64");
//.. }
//.. }
/* var */
if (e->tag == Iex_Tmp) {
HReg r_src = lookupIRTemp(env, e->Iex.Tmp.tmp);
HReg src_masked = newVRegI(env);
addInstr(env, PPC32Instr_Alu32(Palu_AND, src_masked, r_src, PPC32RI_Imm(1)));
addInstr(env, PPC32Instr_Cmp32(Pcmp_U, 7, src_masked, PPC32RI_Imm(1)));
return mk_PPCCondCode( Pct_TRUE, Pcf_EQ );
}
ppIRExpr(e);
vpanic("iselCondCode(ppc32)");
}
/*---------------------------------------------------------*/
/*--- ISEL: Integer expressions (64 bit) ---*/
/*---------------------------------------------------------*/
/* Compute a 64-bit value into a register pair, which is returned as
the first two parameters. As with iselIntExpr_R, these may be
either real or virtual regs; in any case they must not be changed
by subsequent code emitted by the caller. */
static void iselInt64Expr ( HReg* rHi, HReg* rLo, ISelEnv* env, IRExpr* e )
{
iselInt64Expr_wrk(rHi, rLo, env, e);
# if 0
vex_printf("\n"); ppIRExpr(e); vex_printf("\n");
# endif
vassert(hregClass(*rHi) == HRcInt32);
vassert(hregIsVirtual(*rHi));
vassert(hregClass(*rLo) == HRcInt32);
vassert(hregIsVirtual(*rLo));
}
/* DO NOT CALL THIS DIRECTLY ! */
static void iselInt64Expr_wrk ( HReg* rHi, HReg* rLo, ISelEnv* env, IRExpr* e )
{
// HWord fn = 0; /* helper fn for most SIMD64 stuff */
vassert(e);
vassert(typeOfIRExpr(env->type_env,e) == Ity_I64);
//.. /* 64-bit literal */
//.. if (e->tag == Iex_Const) {
//.. ULong w64 = e->Iex.Const.con->Ico.U64;
//.. UInt wHi = ((UInt)(w64 >> 32)) & 0xFFFFFFFF;
//.. UInt wLo = ((UInt)w64) & 0xFFFFFFFF;
//.. HReg tLo = newVRegI(env);
//.. HReg tHi = newVRegI(env);
//.. vassert(e->Iex.Const.con->tag == Ico_U64);
//.. addInstr(env, X86Instr_Alu32R(Xalu_MOV, X86RMI_Imm(wHi), tHi));
//.. addInstr(env, X86Instr_Alu32R(Xalu_MOV, X86RMI_Imm(wLo), tLo));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
/* read 64-bit IRTemp */
if (e->tag == Iex_Tmp) {
lookupIRTemp64( rHi, rLo, env, e->Iex.Tmp.tmp);
return;
}
//.. /* 64-bit load */
//.. if (e->tag == Iex_LDle) {
//.. HReg tLo, tHi;
//.. X86AMode *am0, *am4;
//.. vassert(e->Iex.LDle.ty == Ity_I64);
//.. tLo = newVRegI(env);
//.. tHi = newVRegI(env);
//.. am0 = iselIntExpr_AMode(env, e->Iex.LDle.addr);
//.. am4 = advance4(am0);
//.. addInstr(env, X86Instr_Alu32R( Xalu_MOV, X86RMI_Mem(am0), tLo ));
//.. addInstr(env, X86Instr_Alu32R( Xalu_MOV, X86RMI_Mem(am4), tHi ));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
/* 64-bit GET */
if (e->tag == Iex_Get) {
PPC32AMode* am_addr = PPC32AMode_IR(e->Iex.Get.offset, GuestStatePtr );
PPC32AMode* am_addr4 = advance4(env, am_addr);
HReg tLo = newVRegI(env);
HReg tHi = newVRegI(env);
addInstr(env, PPC32Instr_Load( 4, False, tHi, am_addr ));
addInstr(env, PPC32Instr_Load( 4, False, tLo, am_addr4 ));
*rHi = tHi;
*rLo = tLo;
return;
}
//.. /* 64-bit GETI */
//.. if (e->tag == Iex_GetI) {
//.. X86AMode* am
//.. = genGuestArrayOffset( env, e->Iex.GetI.descr,
//.. e->Iex.GetI.ix, e->Iex.GetI.bias );
//.. X86AMode* am4 = advance4(am);
//.. HReg tLo = newVRegI(env);
//.. HReg tHi = newVRegI(env);
//.. addInstr(env, X86Instr_Alu32R( Xalu_MOV, X86RMI_Mem(am), tLo ));
//.. addInstr(env, X86Instr_Alu32R( Xalu_MOV, X86RMI_Mem(am4), tHi ));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
//.. /* 64-bit Mux0X */
//.. if (e->tag == Iex_Mux0X) {
//.. HReg e0Lo, e0Hi, eXLo, eXHi, r8;
//.. HReg tLo = newVRegI(env);
//.. HReg tHi = newVRegI(env);
//.. iselInt64Expr(&e0Hi, &e0Lo, env, e->Iex.Mux0X.expr0);
//.. iselInt64Expr(&eXHi, &eXLo, env, e->Iex.Mux0X.exprX);
//.. addInstr(env, mk_iMOVsd_RR(eXHi, tHi));
//.. addInstr(env, mk_iMOVsd_RR(eXLo, tLo));
//.. r8 = iselIntExpr_R(env, e->Iex.Mux0X.cond);
//.. addInstr(env, X86Instr_Test32(X86RI_Imm(0xFF), X86RM_Reg(r8)));
//.. /* This assumes the first cmov32 doesn't trash the condition
//.. codes, so they are still available for the second cmov32 */
//.. addInstr(env, X86Instr_CMov32(Xcc_Z,X86RM_Reg(e0Hi),tHi));
//.. addInstr(env, X86Instr_CMov32(Xcc_Z,X86RM_Reg(e0Lo),tLo));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
/* --------- BINARY ops --------- */
if (e->tag == Iex_Binop) {
switch (e->Iex.Binop.op) {
/* 32 x 32 -> 64 multiply */
case Iop_MullU32:
case Iop_MullS32: {
/* get one operand into %r3, and the other into a R/I.
Need to make an educated guess about which is better in
which. */
HReg tLo = newVRegI(env);
HReg tHi = newVRegI(env);
Bool syned = e->Iex.Binop.op == Iop_MullS32;
HReg r_srcL = iselIntExpr_R(env, e->Iex.Binop.arg1);
// CAB: could do better than this...
PPC32RI* ri_srcR = PPC32RI_Reg(iselIntExpr_R(env, e->Iex.Binop.arg2));
addInstr(env, PPC32Instr_MulL(syned, 0, tLo, r_srcL, ri_srcR));
addInstr(env, PPC32Instr_MulL(syned, 1, tHi, r_srcL, ri_srcR));
*rHi = tHi;
*rLo = tLo;
return;
}
//.. /* 64 x 32 -> (32(rem),32(div)) division */
//.. case Iop_DivModU64to32:
//.. case Iop_DivModS64to32: {
//.. /* Get the 64-bit operand into edx:eax, and the other into
//.. any old R/M. */
//.. HReg sHi, sLo;
//.. HReg tLo = newVRegI(env);
//.. HReg tHi = newVRegI(env);
//.. Bool syned = e->Iex.Binop.op == Iop_DivModS64to32;
//.. X86RM* rmRight = iselIntExpr_RM(env, e->Iex.Binop.arg2);
//.. iselInt64Expr(&sHi,&sLo, env, e->Iex.Binop.arg1);
//.. addInstr(env, mk_iMOVsd_RR(sHi, hregX86_EDX()));
//.. addInstr(env, mk_iMOVsd_RR(sLo, hregX86_EAX()));
//.. addInstr(env, X86Instr_Div(syned, Xss_32, rmRight));
//.. addInstr(env, mk_iMOVsd_RR(hregX86_EDX(), tHi));
//.. addInstr(env, mk_iMOVsd_RR(hregX86_EAX(), tLo));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
//..
//.. /* Or64/And64/Xor64 */
//.. case Iop_Or64:
//.. case Iop_And64:
//.. case Iop_Xor64: {
//.. HReg xLo, xHi, yLo, yHi;
//.. HReg tLo = newVRegI(env);
//.. HReg tHi = newVRegI(env);
//.. X86AluOp op = e->Iex.Binop.op==Iop_Or64 ? Xalu_OR
//.. : e->Iex.Binop.op==Iop_And64 ? Xalu_AND
//.. : Xalu_XOR;
//.. iselInt64Expr(&xHi, &xLo, env, e->Iex.Binop.arg1);
//.. addInstr(env, mk_iMOVsd_RR(xHi, tHi));
//.. addInstr(env, mk_iMOVsd_RR(xLo, tLo));
//.. iselInt64Expr(&yHi, &yLo, env, e->Iex.Binop.arg2);
//.. addInstr(env, X86Instr_Alu32R(op, X86RMI_Reg(yHi), tHi));
//.. addInstr(env, X86Instr_Alu32R(op, X86RMI_Reg(yLo), tLo));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
//..
//.. /* Add64/Sub64 */
//.. case Iop_Add64:
//.. case Iop_Sub64: {
//.. HReg xLo, xHi, yLo, yHi;
//.. HReg tLo = newVRegI(env);
//.. HReg tHi = newVRegI(env);
//.. iselInt64Expr(&xHi, &xLo, env, e->Iex.Binop.arg1);
//.. addInstr(env, mk_iMOVsd_RR(xHi, tHi));
//.. addInstr(env, mk_iMOVsd_RR(xLo, tLo));
//.. iselInt64Expr(&yHi, &yLo, env, e->Iex.Binop.arg2);
//.. if (e->Iex.Binop.op==Iop_Add64) {
//.. addInstr(env, X86Instr_Alu32R(Xalu_ADD, X86RMI_Reg(yLo), tLo));
//.. addInstr(env, X86Instr_Alu32R(Xalu_ADC, X86RMI_Reg(yHi), tHi));
//.. } else {
//.. addInstr(env, X86Instr_Alu32R(Xalu_SUB, X86RMI_Reg(yLo), tLo));
//.. addInstr(env, X86Instr_Alu32R(Xalu_SBB, X86RMI_Reg(yHi), tHi));
//.. }
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
/* 32HLto64(e1,e2) */
case Iop_32HLto64:
*rHi = iselIntExpr_R(env, e->Iex.Binop.arg1);
*rLo = iselIntExpr_R(env, e->Iex.Binop.arg2);
return;
//.. /* 64-bit shifts */
//.. case Iop_Shl64: {
//.. /* We use the same ingenious scheme as gcc. Put the value
//.. to be shifted into %hi:%lo, and the shift amount into
//.. %cl. Then (dsts on right, a la ATT syntax):
//..
//.. shldl %cl, %lo, %hi -- make %hi be right for the
//.. -- shift amt %cl % 32
//.. shll %cl, %lo -- make %lo be right for the
//.. -- shift amt %cl % 32
//..
//.. Now, if (shift amount % 64) is in the range 32 .. 63,
//.. we have to do a fixup, which puts the result low half
//.. into the result high half, and zeroes the low half:
//..
//.. testl $32, %ecx
//..
//.. cmovnz %lo, %hi
//.. movl $0, %tmp -- sigh; need yet another reg
//.. cmovnz %tmp, %lo
//.. */
//.. HReg rAmt, sHi, sLo, tHi, tLo, tTemp;
//.. tLo = newVRegI(env);
//.. tHi = newVRegI(env);
//.. tTemp = newVRegI(env);
//.. rAmt = iselIntExpr_R(env, e->Iex.Binop.arg2);
//.. iselInt64Expr(&sHi,&sLo, env, e->Iex.Binop.arg1);
//.. addInstr(env, mk_iMOVsd_RR(rAmt, hregX86_ECX()));
//.. addInstr(env, mk_iMOVsd_RR(sHi, tHi));
//.. addInstr(env, mk_iMOVsd_RR(sLo, tLo));
//.. /* Ok. Now shift amt is in %ecx, and value is in tHi/tLo
//.. and those regs are legitimately modifiable. */
//.. addInstr(env, X86Instr_Sh3232(Xsh_SHL, 0/*%cl*/, tLo, tHi));
//.. addInstr(env, X86Instr_Sh32(Xsh_SHL, 0/*%cl*/, X86RM_Reg(tLo)));
//.. addInstr(env, X86Instr_Test32(X86RI_Imm(32),
//.. X86RM_Reg(hregX86_ECX())));
//.. addInstr(env, X86Instr_CMov32(Xcc_NZ, X86RM_Reg(tLo), tHi));
//.. addInstr(env, X86Instr_Alu32R(Xalu_MOV, X86RMI_Imm(0), tTemp));
//.. addInstr(env, X86Instr_CMov32(Xcc_NZ, X86RM_Reg(tTemp), tLo));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
//..
//.. case Iop_Shr64: {
//.. /* We use the same ingenious scheme as gcc. Put the value
//.. to be shifted into %hi:%lo, and the shift amount into
//.. %cl. Then:
//..
//.. shrdl %cl, %hi, %lo -- make %lo be right for the
//.. -- shift amt %cl % 32
//.. shrl %cl, %hi -- make %hi be right for the
//.. -- shift amt %cl % 32
//..
//.. Now, if (shift amount % 64) is in the range 32 .. 63,
//.. we have to do a fixup, which puts the result high half
//.. into the result low half, and zeroes the high half:
//..
//.. testl $32, %ecx
//..
//.. cmovnz %hi, %lo
//.. movl $0, %tmp -- sigh; need yet another reg
//.. cmovnz %tmp, %hi
//.. */
//.. HReg rAmt, sHi, sLo, tHi, tLo, tTemp;
//.. tLo = newVRegI(env);
//.. tHi = newVRegI(env);
//.. tTemp = newVRegI(env);
//.. rAmt = iselIntExpr_R(env, e->Iex.Binop.arg2);
//.. iselInt64Expr(&sHi,&sLo, env, e->Iex.Binop.arg1);
//.. addInstr(env, mk_iMOVsd_RR(rAmt, hregX86_ECX()));
//.. addInstr(env, mk_iMOVsd_RR(sHi, tHi));
//.. addInstr(env, mk_iMOVsd_RR(sLo, tLo));
//.. /* Ok. Now shift amt is in %ecx, and value is in tHi/tLo
//.. and those regs are legitimately modifiable. */
//.. addInstr(env, X86Instr_Sh3232(Xsh_SHR, 0/*%cl*/, tHi, tLo));
//.. addInstr(env, X86Instr_Sh32(Xsh_SHR, 0/*%cl*/, X86RM_Reg(tHi)));
//.. addInstr(env, X86Instr_Test32(X86RI_Imm(32),
//.. X86RM_Reg(hregX86_ECX())));
//.. addInstr(env, X86Instr_CMov32(Xcc_NZ, X86RM_Reg(tHi), tLo));
//.. addInstr(env, X86Instr_Alu32R(Xalu_MOV, X86RMI_Imm(0), tTemp));
//.. addInstr(env, X86Instr_CMov32(Xcc_NZ, X86RM_Reg(tTemp), tHi));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
//..
//.. /* F64 -> I64 */
//.. /* Sigh, this is an almost exact copy of the F64 -> I32/I16
//.. case. Unfortunately I see no easy way to avoid the
//.. duplication. */
//.. case Iop_F64toI64: {
//.. HReg rf = iselDblExpr(env, e->Iex.Binop.arg2);
//.. HReg tLo = newVRegI(env);
//.. HReg tHi = newVRegI(env);
//..
//.. /* Used several times ... */
//.. /* Careful ... this sharing is only safe because
//.. zero_esp/four_esp do not hold any registers which the
//.. register allocator could attempt to swizzle later. */
//.. X86AMode* zero_esp = X86AMode_IR(0, hregX86_ESP());
//.. X86AMode* four_esp = X86AMode_IR(4, hregX86_ESP());
//..
//.. /* rf now holds the value to be converted, and rrm holds
//.. the rounding mode value, encoded as per the
//.. IRRoundingMode enum. The first thing to do is set the
//.. FPU's rounding mode accordingly. */
//..
//.. /* Create a space for the format conversion. */
//.. /* subl $8, %esp */
//.. sub_from_esp(env, 8);
//..
//.. /* Set host rounding mode */
//.. set_FPU_rounding_mode( env, e->Iex.Binop.arg1 );
//..
//.. /* gistll %rf, 0(%esp) */
//.. addInstr(env, X86Instr_FpLdStI(False/*store*/, 8, rf, zero_esp));
//..
//.. /* movl 0(%esp), %dstLo */
//.. /* movl 4(%esp), %dstHi */
//.. addInstr(env, X86Instr_Alu32R(
//.. Xalu_MOV, X86RMI_Mem(zero_esp), tLo));
//.. addInstr(env, X86Instr_Alu32R(
//.. Xalu_MOV, X86RMI_Mem(four_esp), tHi));
//..
//.. /* Restore default FPU rounding. */
//.. set_FPU_rounding_default( env );
//..
//.. /* addl $8, %esp */
//.. add_to_esp(env, 8);
//..
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
//..
//.. case Iop_Add8x8:
//.. fn = (HWord)h_generic_calc_Add8x8; goto binnish;
//.. case Iop_Add16x4:
//.. fn = (HWord)h_generic_calc_Add16x4; goto binnish;
//.. case Iop_Add32x2:
//.. fn = (HWord)h_generic_calc_Add32x2; goto binnish;
//..
//.. case Iop_Avg8Ux8:
//.. fn = (HWord)h_generic_calc_Avg8Ux8; goto binnish;
//.. case Iop_Avg16Ux4:
//.. fn = (HWord)h_generic_calc_Avg16Ux4; goto binnish;
//..
//.. case Iop_CmpEQ8x8:
//.. fn = (HWord)h_generic_calc_CmpEQ8x8; goto binnish;
//.. case Iop_CmpEQ16x4:
//.. fn = (HWord)h_generic_calc_CmpEQ16x4; goto binnish;
//.. case Iop_CmpEQ32x2:
//.. fn = (HWord)h_generic_calc_CmpEQ32x2; goto binnish;
//..
//.. case Iop_CmpGT8Sx8:
//.. fn = (HWord)h_generic_calc_CmpGT8Sx8; goto binnish;
//.. case Iop_CmpGT16Sx4:
//.. fn = (HWord)h_generic_calc_CmpGT16Sx4; goto binnish;
//.. case Iop_CmpGT32Sx2:
//.. fn = (HWord)h_generic_calc_CmpGT32Sx2; goto binnish;
//..
//.. case Iop_InterleaveHI8x8:
//.. fn = (HWord)h_generic_calc_InterleaveHI8x8; goto binnish;
//.. case Iop_InterleaveLO8x8:
//.. fn = (HWord)h_generic_calc_InterleaveLO8x8; goto binnish;
//.. case Iop_InterleaveHI16x4:
//.. fn = (HWord)h_generic_calc_InterleaveHI16x4; goto binnish;
//.. case Iop_InterleaveLO16x4:
//.. fn = (HWord)h_generic_calc_InterleaveLO16x4; goto binnish;
//.. case Iop_InterleaveHI32x2:
//.. fn = (HWord)h_generic_calc_InterleaveHI32x2; goto binnish;
//.. case Iop_InterleaveLO32x2:
//.. fn = (HWord)h_generic_calc_InterleaveLO32x2; goto binnish;
//..
//.. case Iop_Max8Ux8:
//.. fn = (HWord)h_generic_calc_Max8Ux8; goto binnish;
//.. case Iop_Max16Sx4:
//.. fn = (HWord)h_generic_calc_Max16Sx4; goto binnish;
//.. case Iop_Min8Ux8:
//.. fn = (HWord)h_generic_calc_Min8Ux8; goto binnish;
//.. case Iop_Min16Sx4:
//.. fn = (HWord)h_generic_calc_Min16Sx4; goto binnish;
//..
//.. case Iop_Mul16x4:
//.. fn = (HWord)h_generic_calc_Mul16x4; goto binnish;
//.. case Iop_MulHi16Sx4:
//.. fn = (HWord)h_generic_calc_MulHi16Sx4; goto binnish;
//.. case Iop_MulHi16Ux4:
//.. fn = (HWord)h_generic_calc_MulHi16Ux4; goto binnish;
//..
//.. case Iop_QAdd8Sx8:
//.. fn = (HWord)h_generic_calc_QAdd8Sx8; goto binnish;
//.. case Iop_QAdd16Sx4:
//.. fn = (HWord)h_generic_calc_QAdd16Sx4; goto binnish;
//.. case Iop_QAdd8Ux8:
//.. fn = (HWord)h_generic_calc_QAdd8Ux8; goto binnish;
//.. case Iop_QAdd16Ux4:
//.. fn = (HWord)h_generic_calc_QAdd16Ux4; goto binnish;
//..
//.. case Iop_QNarrow32Sx2:
//.. fn = (HWord)h_generic_calc_QNarrow32Sx2; goto binnish;
//.. case Iop_QNarrow16Sx4:
//.. fn = (HWord)h_generic_calc_QNarrow16Sx4; goto binnish;
//.. case Iop_QNarrow16Ux4:
//.. fn = (HWord)h_generic_calc_QNarrow16Ux4; goto binnish;
//..
//.. case Iop_QSub8Sx8:
//.. fn = (HWord)h_generic_calc_QSub8Sx8; goto binnish;
//.. case Iop_QSub16Sx4:
//.. fn = (HWord)h_generic_calc_QSub16Sx4; goto binnish;
//.. case Iop_QSub8Ux8:
//.. fn = (HWord)h_generic_calc_QSub8Ux8; goto binnish;
//.. case Iop_QSub16Ux4:
//.. fn = (HWord)h_generic_calc_QSub16Ux4; goto binnish;
//..
//.. case Iop_Sub8x8:
//.. fn = (HWord)h_generic_calc_Sub8x8; goto binnish;
//.. case Iop_Sub16x4:
//.. fn = (HWord)h_generic_calc_Sub16x4; goto binnish;
//.. case Iop_Sub32x2:
//.. fn = (HWord)h_generic_calc_Sub32x2; goto binnish;
//..
//.. binnish: {
//.. /* Note: the following assumes all helpers are of
//.. signature
//.. ULong fn ( ULong, ULong ), and they are
//.. not marked as regparm functions.
//.. */
//.. HReg xLo, xHi, yLo, yHi;
//.. HReg tLo = newVRegI(env);
//.. HReg tHi = newVRegI(env);
//.. iselInt64Expr(&yHi, &yLo, env, e->Iex.Binop.arg2);
//.. addInstr(env, X86Instr_Push(X86RMI_Reg(yHi)));
//.. addInstr(env, X86Instr_Push(X86RMI_Reg(yLo)));
//.. iselInt64Expr(&xHi, &xLo, env, e->Iex.Binop.arg1);
//.. addInstr(env, X86Instr_Push(X86RMI_Reg(xHi)));
//.. addInstr(env, X86Instr_Push(X86RMI_Reg(xLo)));
//.. addInstr(env, X86Instr_Call( Xcc_ALWAYS, (UInt)fn, 0 ));
//.. add_to_esp(env, 4*4);
//.. addInstr(env, mk_iMOVsd_RR(hregX86_EDX(), tHi));
//.. addInstr(env, mk_iMOVsd_RR(hregX86_EAX(), tLo));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
//..
//.. case Iop_ShlN32x2:
//.. fn = (HWord)h_generic_calc_ShlN32x2; goto shifty;
//.. case Iop_ShlN16x4:
//.. fn = (HWord)h_generic_calc_ShlN16x4; goto shifty;
//.. case Iop_ShrN32x2:
//.. fn = (HWord)h_generic_calc_ShrN32x2; goto shifty;
//.. case Iop_ShrN16x4:
//.. fn = (HWord)h_generic_calc_ShrN16x4; goto shifty;
//.. case Iop_SarN32x2:
//.. fn = (HWord)h_generic_calc_SarN32x2; goto shifty;
//.. case Iop_SarN16x4:
//.. fn = (HWord)h_generic_calc_SarN16x4; goto shifty;
//.. shifty: {
//.. /* Note: the following assumes all helpers are of
//.. signature
//.. ULong fn ( ULong, UInt ), and they are
//.. not marked as regparm functions.
//.. */
//.. HReg xLo, xHi;
//.. HReg tLo = newVRegI(env);
//.. HReg tHi = newVRegI(env);
//.. X86RMI* y = iselIntExpr_RMI(env, e->Iex.Binop.arg2);
//.. addInstr(env, X86Instr_Push(y));
//.. iselInt64Expr(&xHi, &xLo, env, e->Iex.Binop.arg1);
//.. addInstr(env, X86Instr_Push(X86RMI_Reg(xHi)));
//.. addInstr(env, X86Instr_Push(X86RMI_Reg(xLo)));
//.. addInstr(env, X86Instr_Call( Xcc_ALWAYS, (UInt)fn, 0 ));
//.. add_to_esp(env, 3*4);
//.. addInstr(env, mk_iMOVsd_RR(hregX86_EDX(), tHi));
//.. addInstr(env, mk_iMOVsd_RR(hregX86_EAX(), tLo));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
default:
break;
}
} /* if (e->tag == Iex_Binop) */
/* --------- UNARY ops --------- */
if (e->tag == Iex_Unop) {
switch (e->Iex.Unop.op) {
//.. /* 32Sto64(e) */
//.. case Iop_32Sto64: {
//.. HReg tLo = newVRegI(env);
//.. HReg tHi = newVRegI(env);
//.. HReg src = iselIntExpr_R(env, e->Iex.Unop.arg);
//.. addInstr(env, mk_iMOVsd_RR(src,tHi));
//.. addInstr(env, mk_iMOVsd_RR(src,tLo));
//.. addInstr(env, X86Instr_Sh32(Xsh_SAR, 31, X86RM_Reg(tHi)));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
/* 32Uto64(e) */
case Iop_32Uto64: {
HReg tHi = newVRegI(env);
HReg tLo = iselIntExpr_R(env, e->Iex.Unop.arg);
addInstr(env, mk_iMOVds_RRI(env, tHi, PPC32RI_Imm(0)));
*rHi = tHi;
*rLo = tLo;
return;
}
/* V128{HI}to64 */
case Iop_V128HIto64:
case Iop_V128to64: {
Int off = e->Iex.Unop.op==Iop_V128HIto64 ? 0 : 8;
HReg tLo = newVRegI(env);
HReg tHi = newVRegI(env);
HReg vec = iselVecExpr(env, e->Iex.Unop.arg);
PPC32AMode *sp0, *spLO, *spHI;
sub_from_sp( env, 32 ); // Move SP down 32 bytes
sp0 = PPC32AMode_IR(0, StackFramePtr);
spHI = PPC32AMode_IR(off, StackFramePtr);
spLO = PPC32AMode_IR(off+4, StackFramePtr);
// store as Vec128
addInstr(env, PPC32Instr_AvLdSt( False/*store*/, 16, vec, sp0 ));
// load hi,lo words (of hi/lo half of vec) as Ity_I32's
addInstr(env, PPC32Instr_Load( 4, False, tHi, spHI ));
addInstr(env, PPC32Instr_Load( 4, False, tLo, spLO ));
add_to_sp( env, 32 ); // Reset SP
*rHi = tHi;
*rLo = tLo;
return;
}
//.. /* could do better than this, but for now ... */
//.. case Iop_1Sto64: {
//.. HReg tLo = newVRegI(env);
//.. HReg tHi = newVRegI(env);
//.. X86CondCode cond = iselCondCode(env, e->Iex.Unop.arg);
//.. addInstr(env, X86Instr_Set32(cond,tLo));
//.. addInstr(env, X86Instr_Sh32(Xsh_SHL, 31, X86RM_Reg(tLo)));
//.. addInstr(env, X86Instr_Sh32(Xsh_SAR, 31, X86RM_Reg(tLo)));
//.. addInstr(env, mk_iMOVsd_RR(tLo, tHi));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
//..
//.. /* Not64(e) */
//.. case Iop_Not64: {
//.. HReg tLo = newVRegI(env);
//.. HReg tHi = newVRegI(env);
//.. HReg sHi, sLo;
//.. iselInt64Expr(&sHi, &sLo, env, e->Iex.Unop.arg);
//.. addInstr(env, mk_iMOVsd_RR(sHi, tHi));
//.. addInstr(env, mk_iMOVsd_RR(sLo, tLo));
//.. addInstr(env, X86Instr_Unary32(Xun_NOT,X86RM_Reg(tHi)));
//.. addInstr(env, X86Instr_Unary32(Xun_NOT,X86RM_Reg(tLo)));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
/* ReinterpF64asI64(e) */
/* Given an IEEE754 double, produce an I64 with the same bit
pattern. */
case Iop_ReinterpF64asI64: {
PPC32AMode *am_addr0, *am_addr1;
HReg fr_src = iselDblExpr(env, e->Iex.Unop.arg);
HReg r_dstLo = newVRegI(env);
HReg r_dstHi = newVRegI(env);
sub_from_sp( env, 16 ); // Move SP down 16 bytes
am_addr0 = PPC32AMode_IR(0, StackFramePtr);
am_addr1 = PPC32AMode_IR(4, StackFramePtr);
// store as F64
addInstr(env, PPC32Instr_FpLdSt( False/*store*/, 8, fr_src, am_addr0 ));
// load hi,lo as Ity_I32's
addInstr(env, PPC32Instr_Load( 4, False, r_dstHi, am_addr0 ));
addInstr(env, PPC32Instr_Load( 4, False, r_dstLo, am_addr1 ));
*rHi = r_dstHi;
*rLo = r_dstLo;
add_to_sp( env, 16 ); // Reset SP
return;
}
//.. case Iop_CmpNEZ32x2:
//.. fn = (HWord)h_generic_calc_CmpNEZ32x2; goto unish;
//.. case Iop_CmpNEZ16x4:
//.. fn = (HWord)h_generic_calc_CmpNEZ16x4; goto unish;
//.. case Iop_CmpNEZ8x8:
//.. fn = (HWord)h_generic_calc_CmpNEZ8x8; goto unish;
//.. unish: {
//.. /* Note: the following assumes all helpers are of
//.. signature
//.. ULong fn ( ULong ), and they are
//.. not marked as regparm functions.
//.. */
//.. HReg xLo, xHi;
//.. HReg tLo = newVRegI(env);
//.. HReg tHi = newVRegI(env);
//.. iselInt64Expr(&xHi, &xLo, env, e->Iex.Unop.arg);
//.. addInstr(env, X86Instr_Push(X86RMI_Reg(xHi)));
//.. addInstr(env, X86Instr_Push(X86RMI_Reg(xLo)));
//.. addInstr(env, X86Instr_Call( Xcc_ALWAYS, (UInt)fn, 0 ));
//.. add_to_esp(env, 2*4);
//.. addInstr(env, mk_iMOVsd_RR(hregX86_EDX(), tHi));
//.. addInstr(env, mk_iMOVsd_RR(hregX86_EAX(), tLo));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
default:
break;
}
} /* if (e->tag == Iex_Unop) */
//.. /* --------- CCALL --------- */
//.. if (e->tag == Iex_CCall) {
//.. HReg tLo = newVRegI(env);
//.. HReg tHi = newVRegI(env);
//..
//.. /* Marshal args, do the call, clear stack. */
//.. doHelperCall( env, False, NULL, e->Iex.CCall.cee, e->Iex.CCall.args );
//..
//.. addInstr(env, mk_iMOVsd_RR(hregX86_EDX(), tHi));
//.. addInstr(env, mk_iMOVsd_RR(hregX86_EAX(), tLo));
//.. *rHi = tHi;
//.. *rLo = tLo;
//.. return;
//.. }
vex_printf("iselInt64Expr(ppc32): No such tag(%d)\n", e->tag);
ppIRExpr(e);
vpanic("iselInt64Expr(ppc32)");
}
/*---------------------------------------------------------*/
/*--- ISEL: Floating point expressions (32 bit) ---*/
/*---------------------------------------------------------*/
/* Nothing interesting here; really just wrappers for
64-bit stuff. */
static HReg iselFltExpr ( ISelEnv* env, IRExpr* e )
{
HReg r = iselFltExpr_wrk( env, e );
# if 0
vex_printf("\n"); ppIRExpr(e); vex_printf("\n");
# endif
vassert(hregClass(r) == HRcFlt64); /* yes, really Flt64 */
vassert(hregIsVirtual(r));
return r;
}
/* DO NOT CALL THIS DIRECTLY */
static HReg iselFltExpr_wrk ( ISelEnv* env, IRExpr* e )
{
IRType ty = typeOfIRExpr(env->type_env,e);
vassert(ty == Ity_F32);
if (e->tag == Iex_Tmp) {
return lookupIRTemp(env, e->Iex.Tmp.tmp);
}
if (e->tag == Iex_LDle) {
PPC32AMode* am_addr;
HReg r_dst = newVRegF(env);
vassert(e->Iex.LDle.ty == Ity_F32);
am_addr = iselIntExpr_AMode(env, e->Iex.LDle.addr);
addInstr(env, PPC32Instr_FpLdSt(True/*load*/, 4, r_dst, am_addr));
return r_dst;
}
if (e->tag == Iex_Binop
&& e->Iex.Binop.op == Iop_F64toF32) {
/* Although the result is still held in a standard FPU register,
we need to round it to reflect the loss of accuracy/range
entailed in casting it to a 32-bit float. */
HReg r_dst = newVRegF(env);
HReg r_src = iselDblExpr(env, e->Iex.Binop.arg2);
set_FPU_rounding_mode( env, e->Iex.Binop.arg1 );
addInstr(env, PPC32Instr_FpF64toF32(r_dst, r_src));
set_FPU_rounding_default( env );
return r_dst;
}
if (e->tag == Iex_Get) {
HReg r_dst = newVRegF(env);
PPC32AMode* am_addr = PPC32AMode_IR(e->Iex.Get.offset, GuestStatePtr );
addInstr(env, PPC32Instr_FpLdSt( True/*load*/, 4, r_dst, am_addr ));
return r_dst;
}
//.. if (e->tag == Iex_Unop
//.. && e->Iex.Unop.op == Iop_ReinterpI32asF32) {
//.. /* Given an I32, produce an IEEE754 float with the same bit
//.. pattern. */
//.. HReg dst = newVRegF(env);
//.. X86RMI* rmi = iselIntExpr_RMI(env, e->Iex.Unop.arg);
//.. /* paranoia */
//.. addInstr(env, X86Instr_Push(rmi));
//.. addInstr(env, X86Instr_FpLdSt(
//.. True/*load*/, 4, dst,
//.. X86AMode_IR(0, hregX86_ESP())));
//.. add_to_esp(env, 4);
//.. return dst;
//.. }
vex_printf("iselFltExpr(ppc32): No such tag(%d)\n", e->tag);
ppIRExpr(e);
vpanic("iselFltExpr_wrk(ppc32)");
}
/*---------------------------------------------------------*/
/*--- ISEL: Floating point expressions (64 bit) ---*/
/*---------------------------------------------------------*/
/* Compute a 64-bit floating point value into a register, the identity
of which is returned. As with iselIntExpr_R, the reg may be either
real or virtual; in any case it must not be changed by subsequent
code emitted by the caller. */
/* IEEE 754 formats. From http://www.freesoft.org/CIE/RFC/1832/32.htm:
Type S (1 bit) E (11 bits) F (52 bits)
---- --------- ----------- -----------
signalling NaN u 2047 (max) .0uuuuu---u
(with at least
one 1 bit)
quiet NaN u 2047 (max) .1uuuuu---u
negative infinity 1 2047 (max) .000000---0
positive infinity 0 2047 (max) .000000---0
negative zero 1 0 .000000---0
positive zero 0 0 .000000---0
*/
static HReg iselDblExpr ( ISelEnv* env, IRExpr* e )
{
HReg r = iselDblExpr_wrk( env, e );
# if 0
vex_printf("\n"); ppIRExpr(e); vex_printf("\n");
# endif
vassert(hregClass(r) == HRcFlt64);
vassert(hregIsVirtual(r));
return r;
}
/* DO NOT CALL THIS DIRECTLY */
static HReg iselDblExpr_wrk ( ISelEnv* env, IRExpr* e )
{
IRType ty = typeOfIRExpr(env->type_env,e);
vassert(e);
vassert(ty == Ity_F64);
if (e->tag == Iex_Tmp) {
return lookupIRTemp(env, e->Iex.Tmp.tmp);
}
/* --------- LITERAL --------- */
if (e->tag == Iex_Const) {
union { UInt u32x2[2]; ULong u64; Double f64; } u;
vassert(sizeof(u) == 8);
vassert(sizeof(u.u64) == 8);
vassert(sizeof(u.f64) == 8);
vassert(sizeof(u.u32x2) == 8);
if (e->Iex.Const.con->tag == Ico_F64) {
u.f64 = e->Iex.Const.con->Ico.F64;
}
else if (e->Iex.Const.con->tag == Ico_F64i) {
u.u64 = e->Iex.Const.con->Ico.F64i;
}
else
vpanic("iselDblExpr(ppc32): const");
HReg r_srcHi = newVRegI(env);
HReg r_srcLo = newVRegI(env);
addInstr(env, mk_iMOVds_RRI(env, r_srcHi, PPC32RI_Imm(u.u32x2[1])));
addInstr(env, mk_iMOVds_RRI(env, r_srcLo, PPC32RI_Imm(u.u32x2[0])));
return mk_LoadRRtoFPR( env, r_srcHi, r_srcLo );
}
if (e->tag == Iex_LDle) {
HReg r_dst = newVRegF(env);
PPC32AMode* am_addr;
vassert(e->Iex.LDle.ty == Ity_F64);
am_addr = iselIntExpr_AMode(env, e->Iex.LDle.addr);
addInstr(env, PPC32Instr_FpLdSt(True/*load*/, 8, r_dst, am_addr));
return r_dst;
}
if (e->tag == Iex_Get) {
HReg r_dst = newVRegF(env);
PPC32AMode* am_addr = PPC32AMode_IR(e->Iex.Get.offset, GuestStatePtr );
addInstr(env, PPC32Instr_FpLdSt( True/*load*/, 8, r_dst, am_addr ));
return r_dst;
}
//.. if (e->tag == Iex_GetI) {
//.. X86AMode* am
//.. = genGuestArrayOffset(
//.. env, e->Iex.GetI.descr,
//.. e->Iex.GetI.ix, e->Iex.GetI.bias );
//.. HReg res = newVRegF(env);
//.. addInstr(env, X86Instr_FpLdSt( True/*load*/, 8, res, am ));
//.. return res;
//.. }
if (e->tag == Iex_Binop) {
PPC32FpOp fpop = Pfp_INVALID;
switch (e->Iex.Binop.op) {
case Iop_AddF64: fpop = Pfp_ADD; break;
case Iop_SubF64: fpop = Pfp_SUB; break;
case Iop_MulF64: fpop = Pfp_MUL; break;
case Iop_DivF64: fpop = Pfp_DIV; break;
default: break;
}
if (fpop != Pfp_INVALID) {
HReg r_dst = newVRegF(env);
HReg r_srcL = iselDblExpr(env, e->Iex.Binop.arg1);
HReg r_srcR = iselDblExpr(env, e->Iex.Binop.arg2);
addInstr(env, PPC32Instr_FpBinary(fpop, r_dst, r_srcL, r_srcR));
return r_dst;
}
}
//.. if (e->tag == Iex_Binop && e->Iex.Binop.op == Iop_RoundF64) {
//.. HReg rf = iselDblExpr(env, e->Iex.Binop.arg2);
//.. HReg dst = newVRegF(env);
//..
//.. /* rf now holds the value to be rounded. The first thing to do
//.. is set the FPU's rounding mode accordingly. */
//..
//.. /* Set host rounding mode */
//.. set_FPU_rounding_mode( env, e->Iex.Binop.arg1 );
//..
//.. /* grndint %rf, %dst */
//.. addInstr(env, X86Instr_FpUnary(Xfp_ROUND, rf, dst));
//..
//.. /* Restore default FPU rounding. */
//.. set_FPU_rounding_default( env );
//..
//.. return dst;
//.. }
//.. if (e->tag == Iex_Binop && e->Iex.Binop.op == Iop_I64toF64) {
//.. HReg fr_dst = newVRegF(env);
//.. HReg rHi,rLo;
//.. iselInt64Expr( &rHi, &rLo, env, e->Iex.Binop.arg2);
//.. addInstr(env, PPC32Instr_Push(PPC32RMI_Reg(rHi)));
//.. addInstr(env, PPC32Instr_Push(PPC32RMI_Reg(rLo)));
//..
//.. /* Set host rounding mode */
//.. set_FPU_rounding_mode( env, e->Iex.Binop.arg1 );
//..
//.. PPC32AMode* am_addr = ...
//.. addInstr(env, PPC32Instr_FpLdSt( True/*load*/, 8, r_dst,
//.. PPC32AMode_IR(0, GuestStatePtr ) ));
//..
//..
//.. addInstr(env, PPC32Instr_FpLdStI(
//.. True/*load*/, 8, fr_dst,
//.. PPC32AMode_IR(0, hregPPC32_ESP())));
//..
//.. /* Restore default FPU rounding. */
//.. set_FPU_rounding_default( env );
//..
//.. add_to_esp(env, 8);
//.. return fr_dst;
//.. }
if (e->tag == Iex_Unop) {
PPC32FpOp fpop = Pfp_INVALID;
switch (e->Iex.Unop.op) {
case Iop_NegF64: fpop = Pfp_NEG; break;
case Iop_AbsF64: fpop = Pfp_ABS; break;
case Iop_SqrtF64: fpop = Pfp_SQRT; break;
//.. case Iop_SinF64: fpop = Xfp_SIN; break;
//.. case Iop_CosF64: fpop = Xfp_COS; break;
//.. case Iop_TanF64: fpop = Xfp_TAN; break;
//.. case Iop_2xm1F64: fpop = Xfp_2XM1; break;
default: break;
}
if (fpop != Pfp_INVALID) {
HReg fr_dst = newVRegF(env);
HReg fr_src = iselDblExpr(env, e->Iex.Unop.arg);
addInstr(env, PPC32Instr_FpUnary(fpop, fr_dst, fr_src));
//.. if (fpop != Pfp_SQRT && fpop != Xfp_NEG && fpop != Xfp_ABS)
//.. roundToF64(env, fr_dst);
return fr_dst;
}
}
if (e->tag == Iex_Unop) {
switch (e->Iex.Unop.op) {
//.. case Iop_I32toF64: {
//.. HReg dst = newVRegF(env);
//.. HReg ri = iselIntExpr_R(env, e->Iex.Unop.arg);
//.. addInstr(env, X86Instr_Push(X86RMI_Reg(ri)));
//.. set_FPU_rounding_default(env);
//.. addInstr(env, X86Instr_FpLdStI(
//.. True/*load*/, 4, dst,
//.. X86AMode_IR(0, hregX86_ESP())));
//.. add_to_esp(env, 4);
//.. return dst;
//.. }
case Iop_ReinterpI64asF64: {
/* Given an I64, produce an IEEE754 double with the same
bit pattern. */
HReg r_srcHi, r_srcLo;
iselInt64Expr( &r_srcHi, &r_srcLo, env, e->Iex.Unop.arg);
return mk_LoadRRtoFPR( env, r_srcHi, r_srcLo );
}
case Iop_F32toF64: {
/* this is a no-op */
HReg res = iselFltExpr(env, e->Iex.Unop.arg);
return res;
}
default:
break;
}
}
/* --------- MULTIPLEX --------- */
if (e->tag == Iex_Mux0X) {
if (ty == Ity_F64
&& typeOfIRExpr(env->type_env,e->Iex.Mux0X.cond) == Ity_I8) {
PPC32CondCode cc = mk_PPCCondCode( Pct_TRUE, Pcf_EQ );
HReg r_cond = iselIntExpr_R(env, e->Iex.Mux0X.cond);
HReg frX = iselDblExpr(env, e->Iex.Mux0X.exprX);
HReg fr0 = iselDblExpr(env, e->Iex.Mux0X.expr0);
HReg fr_dst = newVRegF(env);
addInstr(env, PPC32Instr_FpUnary( Pfp_MOV, fr_dst, frX ));
addInstr(env, PPC32Instr_Cmp32(Pcmp_U, 7, r_cond, PPC32RI_Imm(0)));
addInstr(env, PPC32Instr_FpCMov( cc, fr_dst, fr0 ));
return fr_dst;
}
}
vex_printf("iselDblExpr(ppc32): No such tag(%d)\n", e->tag);
ppIRExpr(e);
vpanic("iselDblExpr_wrk(ppc32)");
}
/*---------------------------------------------------------*/
/*--- ISEL: SIMD (Vector) expressions, 128 bit. ---*/
/*---------------------------------------------------------*/
static HReg iselVecExpr ( ISelEnv* env, IRExpr* e )
{
HReg r = iselVecExpr_wrk( env, e );
# if 0
vex_printf("\n"); ppIRExpr(e); vex_printf("\n");
# endif
vassert(hregClass(r) == HRcVec128);
vassert(hregIsVirtual(r));
return r;
}
/* DO NOT CALL THIS DIRECTLY */
static HReg iselVecExpr_wrk ( ISelEnv* env, IRExpr* e )
{
//.. Bool arg1isEReg = False;
PPC32AvOp op = Pav_INVALID;
IRType ty = typeOfIRExpr(env->type_env,e);
vassert(e);
vassert(ty == Ity_V128);
if (e->tag == Iex_Tmp) {
return lookupIRTemp(env, e->Iex.Tmp.tmp);
}
if (e->tag == Iex_Get) {
HReg dst = newVRegV(env);
addInstr(env,
PPC32Instr_AvLdSt( True/*load*/, 16, dst,
PPC32AMode_IR(e->Iex.Get.offset, GuestStatePtr)));
return dst;
}
//.. if (e->tag == Iex_LDle) {
//.. HReg dst = newVRegV(env);
//.. X86AMode* am = iselIntExpr_AMode(env, e->Iex.LDle.addr);
//.. addInstr(env, X86Instr_SseLdSt( True/*load*/, dst, am ));
//.. return dst;
//.. }
//..
//.. if (e->tag == Iex_Const) {
//.. HReg dst = newVRegV(env);
//.. vassert(e->Iex.Const.con->tag == Ico_V128);
//.. addInstr(env, X86Instr_SseConst(e->Iex.Const.con->Ico.V128, dst));
//.. return dst;
//.. }
//..
//.. if (e->tag == Iex_Unop) {
//.. switch (e->Iex.Unop.op) {
//..
//.. case Iop_Not128: {
//.. HReg arg = iselVecExpr(env, e->Iex.Unop.arg);
//.. return do_sse_Not128(env, arg);
//.. }
//..
//.. case Iop_CmpNEZ64x2: {
//.. /* We can use SSE2 instructions for this. */
//.. /* Ideally, we want to do a 64Ix2 comparison against zero of
//.. the operand. Problem is no such insn exists. Solution
//.. therefore is to do a 32Ix4 comparison instead, and bitwise-
//.. negate (NOT) the result. Let a,b,c,d be 32-bit lanes, and
//.. let the not'd result of this initial comparison be a:b:c:d.
//.. What we need to compute is (a|b):(a|b):(c|d):(c|d). So, use
//.. pshufd to create a value b:a:d:c, and OR that with a:b:c:d,
//.. giving the required result.
//..
//.. The required selection sequence is 2,3,0,1, which
//.. according to Intel's documentation means the pshufd
//.. literal value is 0xB1, that is,
//.. (2 << 6) | (3 << 4) | (0 << 2) | (1 << 0)
//.. */
//.. HReg arg = iselVecExpr(env, e->Iex.Unop.arg);
//.. HReg tmp = newVRegV(env);
//.. HReg dst = newVRegV(env);
//.. REQUIRE_SSE2;
//.. addInstr(env, X86Instr_SseReRg(Xsse_XOR, tmp, tmp));
//.. addInstr(env, X86Instr_SseReRg(Xsse_CMPEQ32, arg, tmp));
//.. tmp = do_sse_Not128(env, tmp);
//.. addInstr(env, X86Instr_SseShuf(0xB1, tmp, dst));
//.. addInstr(env, X86Instr_SseReRg(Xsse_OR, tmp, dst));
//.. return dst;
//.. }
//..
//.. case Iop_CmpNEZ32x4: {
//.. /* Sigh, we have to generate lousy code since this has to
//.. work on SSE1 hosts */
//.. /* basically, the idea is: for each lane:
//.. movl lane, %r ; negl %r (now CF = lane==0 ? 0 : 1)
//.. sbbl %r, %r (now %r = 1Sto32(CF))
//.. movl %r, lane
//.. */
//.. Int i;
//.. X86AMode* am;
//.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP());
//.. HReg arg = iselVecExpr(env, e->Iex.Unop.arg);
//.. HReg dst = newVRegV(env);
//.. HReg r32 = newVRegI(env);
//.. sub_from_esp(env, 16);
//.. addInstr(env, X86Instr_SseLdSt(False/*store*/, arg, esp0));
//.. for (i = 0; i < 4; i++) {
//.. am = X86AMode_IR(i*4, hregX86_ESP());
//.. addInstr(env, X86Instr_Alu32R(Xalu_MOV, X86RMI_Mem(am), r32));
//.. addInstr(env, X86Instr_Unary32(Xun_NEG, X86RM_Reg(r32)));
//.. addInstr(env, X86Instr_Alu32R(Xalu_SBB, X86RMI_Reg(r32), r32));
//.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(r32), am));
//.. }
//.. addInstr(env, X86Instr_SseLdSt(True/*load*/, dst, esp0));
//.. add_to_esp(env, 16);
//.. return dst;
//.. }
//..
//.. case Iop_CmpNEZ8x16:
//.. case Iop_CmpNEZ16x8: {
//.. /* We can use SSE2 instructions for this. */
//.. HReg arg;
//.. HReg vec0 = newVRegV(env);
//.. HReg vec1 = newVRegV(env);
//.. HReg dst = newVRegV(env);
//.. X86SseOp cmpOp
//.. = e->Iex.Unop.op==Iop_CmpNEZ16x8 ? Xsse_CMPEQ16
//.. : Xsse_CMPEQ8;
//.. REQUIRE_SSE2;
//.. addInstr(env, X86Instr_SseReRg(Xsse_XOR, vec0, vec0));
//.. addInstr(env, mk_vMOVsd_RR(vec0, vec1));
//.. addInstr(env, X86Instr_Sse32Fx4(Xsse_CMPEQF, vec1, vec1));
//.. /* defer arg computation to here so as to give CMPEQF as long
//.. as possible to complete */
//.. arg = iselVecExpr(env, e->Iex.Unop.arg);
//.. /* vec0 is all 0s; vec1 is all 1s */
//.. addInstr(env, mk_vMOVsd_RR(arg, dst));
//.. /* 16x8 or 8x16 comparison == */
//.. addInstr(env, X86Instr_SseReRg(cmpOp, vec0, dst));
//.. /* invert result */
//.. addInstr(env, X86Instr_SseReRg(Xsse_XOR, vec1, dst));
//.. return dst;
//.. }
//..
//.. case Iop_Recip32Fx4: op = Xsse_RCPF; goto do_32Fx4_unary;
//.. case Iop_RSqrt32Fx4: op = Xsse_RSQRTF; goto do_32Fx4_unary;
//.. case Iop_Sqrt32Fx4: op = Xsse_SQRTF; goto do_32Fx4_unary;
//.. do_32Fx4_unary:
//.. {
//.. HReg arg = iselVecExpr(env, e->Iex.Unop.arg);
//.. HReg dst = newVRegV(env);
//.. addInstr(env, X86Instr_Sse32Fx4(op, arg, dst));
//.. return dst;
//.. }
//..
//.. case Iop_Recip64Fx2: op = Xsse_RCPF; goto do_64Fx2_unary;
//.. case Iop_RSqrt64Fx2: op = Xsse_RSQRTF; goto do_64Fx2_unary;
//.. case Iop_Sqrt64Fx2: op = Xsse_SQRTF; goto do_64Fx2_unary;
//.. do_64Fx2_unary:
//.. {
//.. HReg arg = iselVecExpr(env, e->Iex.Unop.arg);
//.. HReg dst = newVRegV(env);
//.. REQUIRE_SSE2;
//.. addInstr(env, X86Instr_Sse64Fx2(op, arg, dst));
//.. return dst;
//.. }
//..
//.. case Iop_Recip32F0x4: op = Xsse_RCPF; goto do_32F0x4_unary;
//.. case Iop_RSqrt32F0x4: op = Xsse_RSQRTF; goto do_32F0x4_unary;
//.. case Iop_Sqrt32F0x4: op = Xsse_SQRTF; goto do_32F0x4_unary;
//.. do_32F0x4_unary:
//.. {
//.. /* A bit subtle. We have to copy the arg to the result
//.. register first, because actually doing the SSE scalar insn
//.. leaves the upper 3/4 of the destination register
//.. unchanged. Whereas the required semantics of these
//.. primops is that the upper 3/4 is simply copied in from the
//.. argument. */
//.. HReg arg = iselVecExpr(env, e->Iex.Unop.arg);
//.. HReg dst = newVRegV(env);
//.. addInstr(env, mk_vMOVsd_RR(arg, dst));
//.. addInstr(env, X86Instr_Sse32FLo(op, arg, dst));
//.. return dst;
//.. }
//..
//.. case Iop_Recip64F0x2: op = Xsse_RCPF; goto do_64F0x2_unary;
//.. case Iop_RSqrt64F0x2: op = Xsse_RSQRTF; goto do_64F0x2_unary;
//.. case Iop_Sqrt64F0x2: op = Xsse_SQRTF; goto do_64F0x2_unary;
//.. do_64F0x2_unary:
//.. {
//.. /* A bit subtle. We have to copy the arg to the result
//.. register first, because actually doing the SSE scalar insn
//.. leaves the upper half of the destination register
//.. unchanged. Whereas the required semantics of these
//.. primops is that the upper half is simply copied in from the
//.. argument. */
//.. HReg arg = iselVecExpr(env, e->Iex.Unop.arg);
//.. HReg dst = newVRegV(env);
//.. REQUIRE_SSE2;
//.. addInstr(env, mk_vMOVsd_RR(arg, dst));
//.. addInstr(env, X86Instr_Sse64FLo(op, arg, dst));
//.. return dst;
//.. }
//..
//.. case Iop_32UtoV128: {
//.. HReg dst = newVRegV(env);
//.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP());
//.. X86RMI* rmi = iselIntExpr_RMI(env, e->Iex.Unop.arg);
//.. addInstr(env, X86Instr_Push(rmi));
//.. addInstr(env, X86Instr_SseLdzLO(4, dst, esp0));
//.. add_to_esp(env, 4);
//.. return dst;
//.. }
//..
//.. case Iop_64UtoV128: {
//.. HReg rHi, rLo;
//.. HReg dst = newVRegV(env);
//.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP());
//.. iselInt64Expr(&rHi, &rLo, env, e->Iex.Unop.arg);
//.. addInstr(env, X86Instr_Push(X86RMI_Reg(rHi)));
//.. addInstr(env, X86Instr_Push(X86RMI_Reg(rLo)));
//.. addInstr(env, X86Instr_SseLdzLO(8, dst, esp0));
//.. add_to_esp(env, 8);
//.. return dst;
//.. }
//..
//.. default:
//.. break;
//.. } /* switch (e->Iex.Unop.op) */
//.. } /* if (e->tag == Iex_Unop) */
//..
//.. if (e->tag == Iex_Binop) {
//.. switch (e->Iex.Binop.op) {
//..
//.. case Iop_SetV128lo32: {
//.. HReg dst = newVRegV(env);
//.. HReg srcV = iselVecExpr(env, e->Iex.Binop.arg1);
//.. HReg srcI = iselIntExpr_R(env, e->Iex.Binop.arg2);
//.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP());
//.. sub_from_esp(env, 16);
//.. addInstr(env, X86Instr_SseLdSt(False/*store*/, srcV, esp0));
//.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(srcI), esp0));
//.. addInstr(env, X86Instr_SseLdSt(True/*load*/, dst, esp0));
//.. add_to_esp(env, 16);
//.. return dst;
//.. }
//..
//.. case Iop_SetV128lo64: {
//.. HReg dst = newVRegV(env);
//.. HReg srcV = iselVecExpr(env, e->Iex.Binop.arg1);
//.. HReg srcIhi, srcIlo;
//.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP());
//.. X86AMode* esp4 = advance4(esp0);
//.. iselInt64Expr(&srcIhi, &srcIlo, env, e->Iex.Binop.arg2);
//.. sub_from_esp(env, 16);
//.. addInstr(env, X86Instr_SseLdSt(False/*store*/, srcV, esp0));
//.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(srcIlo), esp0));
//.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(srcIhi), esp4));
//.. addInstr(env, X86Instr_SseLdSt(True/*load*/, dst, esp0));
//.. add_to_esp(env, 16);
//.. return dst;
//.. }
//..
//.. case Iop_64HLtoV128: {
//.. HReg r3, r2, r1, r0;
//.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP());
//.. X86AMode* esp4 = advance4(esp0);
//.. X86AMode* esp8 = advance4(esp4);
//.. X86AMode* esp12 = advance4(esp8);
//.. HReg dst = newVRegV(env);
//.. /* do this via the stack (easy, convenient, etc) */
//.. sub_from_esp(env, 16);
//.. /* Do the less significant 64 bits */
//.. iselInt64Expr(&r1, &r0, env, e->Iex.Binop.arg2);
//.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(r0), esp0));
//.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(r1), esp4));
//.. /* Do the more significant 64 bits */
//.. iselInt64Expr(&r3, &r2, env, e->Iex.Binop.arg1);
//.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(r2), esp8));
//.. addInstr(env, X86Instr_Alu32M(Xalu_MOV, X86RI_Reg(r3), esp12));
//.. /* Fetch result back from stack. */
//.. addInstr(env, X86Instr_SseLdSt(True/*load*/, dst, esp0));
//.. add_to_esp(env, 16);
//.. return dst;
//.. }
//..
//.. case Iop_CmpEQ32Fx4: op = Xsse_CMPEQF; goto do_32Fx4;
//.. case Iop_CmpLT32Fx4: op = Xsse_CMPLTF; goto do_32Fx4;
//.. case Iop_CmpLE32Fx4: op = Xsse_CMPLEF; goto do_32Fx4;
//.. case Iop_Add32Fx4: op = Xsse_ADDF; goto do_32Fx4;
//.. case Iop_Div32Fx4: op = Xsse_DIVF; goto do_32Fx4;
//.. case Iop_Max32Fx4: op = Xsse_MAXF; goto do_32Fx4;
//.. case Iop_Min32Fx4: op = Xsse_MINF; goto do_32Fx4;
//.. case Iop_Mul32Fx4: op = Xsse_MULF; goto do_32Fx4;
//.. case Iop_Sub32Fx4: op = Xsse_SUBF; goto do_32Fx4;
//.. do_32Fx4:
//.. {
//.. HReg argL = iselVecExpr(env, e->Iex.Binop.arg1);
//.. HReg argR = iselVecExpr(env, e->Iex.Binop.arg2);
//.. HReg dst = newVRegV(env);
//.. addInstr(env, mk_vMOVsd_RR(argL, dst));
//.. addInstr(env, X86Instr_Sse32Fx4(op, argR, dst));
//.. return dst;
//.. }
//..
//.. case Iop_CmpEQ64Fx2: op = Xsse_CMPEQF; goto do_64Fx2;
//.. case Iop_CmpLT64Fx2: op = Xsse_CMPLTF; goto do_64Fx2;
//.. case Iop_CmpLE64Fx2: op = Xsse_CMPLEF; goto do_64Fx2;
//.. case Iop_Add64Fx2: op = Xsse_ADDF; goto do_64Fx2;
//.. case Iop_Div64Fx2: op = Xsse_DIVF; goto do_64Fx2;
//.. case Iop_Max64Fx2: op = Xsse_MAXF; goto do_64Fx2;
//.. case Iop_Min64Fx2: op = Xsse_MINF; goto do_64Fx2;
//.. case Iop_Mul64Fx2: op = Xsse_MULF; goto do_64Fx2;
//.. case Iop_Sub64Fx2: op = Xsse_SUBF; goto do_64Fx2;
//.. do_64Fx2:
//.. {
//.. HReg argL = iselVecExpr(env, e->Iex.Binop.arg1);
//.. HReg argR = iselVecExpr(env, e->Iex.Binop.arg2);
//.. HReg dst = newVRegV(env);
//.. REQUIRE_SSE2;
//.. addInstr(env, mk_vMOVsd_RR(argL, dst));
//.. addInstr(env, X86Instr_Sse64Fx2(op, argR, dst));
//.. return dst;
//.. }
//..
//.. case Iop_CmpEQ32F0x4: op = Xsse_CMPEQF; goto do_32F0x4;
//.. case Iop_CmpLT32F0x4: op = Xsse_CMPLTF; goto do_32F0x4;
//.. case Iop_CmpLE32F0x4: op = Xsse_CMPLEF; goto do_32F0x4;
//.. case Iop_Add32F0x4: op = Xsse_ADDF; goto do_32F0x4;
//.. case Iop_Div32F0x4: op = Xsse_DIVF; goto do_32F0x4;
//.. case Iop_Max32F0x4: op = Xsse_MAXF; goto do_32F0x4;
//.. case Iop_Min32F0x4: op = Xsse_MINF; goto do_32F0x4;
//.. case Iop_Mul32F0x4: op = Xsse_MULF; goto do_32F0x4;
//.. case Iop_Sub32F0x4: op = Xsse_SUBF; goto do_32F0x4;
//.. do_32F0x4: {
//.. HReg argL = iselVecExpr(env, e->Iex.Binop.arg1);
//.. HReg argR = iselVecExpr(env, e->Iex.Binop.arg2);
//.. HReg dst = newVRegV(env);
//.. addInstr(env, mk_vMOVsd_RR(argL, dst));
//.. addInstr(env, X86Instr_Sse32FLo(op, argR, dst));
//.. return dst;
//.. }
//..
//.. case Iop_CmpEQ64F0x2: op = Xsse_CMPEQF; goto do_64F0x2;
//.. case Iop_CmpLT64F0x2: op = Xsse_CMPLTF; goto do_64F0x2;
//.. case Iop_CmpLE64F0x2: op = Xsse_CMPLEF; goto do_64F0x2;
//.. case Iop_Add64F0x2: op = Xsse_ADDF; goto do_64F0x2;
//.. case Iop_Div64F0x2: op = Xsse_DIVF; goto do_64F0x2;
//.. case Iop_Max64F0x2: op = Xsse_MAXF; goto do_64F0x2;
//.. case Iop_Min64F0x2: op = Xsse_MINF; goto do_64F0x2;
//.. case Iop_Mul64F0x2: op = Xsse_MULF; goto do_64F0x2;
//.. case Iop_Sub64F0x2: op = Xsse_SUBF; goto do_64F0x2;
//.. do_64F0x2: {
//.. HReg argL = iselVecExpr(env, e->Iex.Binop.arg1);
//.. HReg argR = iselVecExpr(env, e->Iex.Binop.arg2);
//.. HReg dst = newVRegV(env);
//.. REQUIRE_SSE2;
//.. addInstr(env, mk_vMOVsd_RR(argL, dst));
//.. addInstr(env, X86Instr_Sse64FLo(op, argR, dst));
//.. return dst;
//.. }
//..
//.. case Iop_QNarrow32Sx4:
//.. op = Xsse_PACKSSD; arg1isEReg = True; goto do_SseReRg;
//.. case Iop_QNarrow16Sx8:
//.. op = Xsse_PACKSSW; arg1isEReg = True; goto do_SseReRg;
//.. case Iop_QNarrow16Ux8:
//.. op = Xsse_PACKUSW; arg1isEReg = True; goto do_SseReRg;
//..
//.. case Iop_InterleaveHI8x16:
//.. op = Xsse_UNPCKHB; arg1isEReg = True; goto do_SseReRg;
//.. case Iop_InterleaveHI16x8:
//.. op = Xsse_UNPCKHW; arg1isEReg = True; goto do_SseReRg;
//.. case Iop_InterleaveHI32x4:
//.. op = Xsse_UNPCKHD; arg1isEReg = True; goto do_SseReRg;
//.. case Iop_InterleaveHI64x2:
//.. op = Xsse_UNPCKHQ; arg1isEReg = True; goto do_SseReRg;
//..
//.. case Iop_InterleaveLO8x16:
//.. op = Xsse_UNPCKLB; arg1isEReg = True; goto do_SseReRg;
//.. case Iop_InterleaveLO16x8:
//.. op = Xsse_UNPCKLW; arg1isEReg = True; goto do_SseReRg;
//.. case Iop_InterleaveLO32x4:
//.. op = Xsse_UNPCKLD; arg1isEReg = True; goto do_SseReRg;
//.. case Iop_InterleaveLO64x2:
//.. op = Xsse_UNPCKLQ; arg1isEReg = True; goto do_SseReRg;
//..
//.. case Iop_AndV128: op = Xsse_AND; goto do_SseReRg;
//.. case Iop_OrV128: op = Xsse_OR; goto do_SseReRg;
//.. case Iop_XorV128: op = Xsse_XOR; goto do_SseReRg;
//.. case Iop_Add8x16: op = Xsse_ADD8; goto do_SseReRg;
//.. case Iop_Add16x8: op = Xsse_ADD16; goto do_SseReRg;
//.. case Iop_Add32x4: op = Xsse_ADD32; goto do_SseReRg;
//.. case Iop_Add64x2: op = Xsse_ADD64; goto do_SseReRg;
//.. case Iop_QAdd8Sx16: op = Xsse_QADD8S; goto do_SseReRg;
//.. case Iop_QAdd16Sx8: op = Xsse_QADD16S; goto do_SseReRg;
//.. case Iop_QAdd8Ux16: op = Xsse_QADD8U; goto do_SseReRg;
//.. case Iop_QAdd16Ux8: op = Xsse_QADD16U; goto do_SseReRg;
//.. case Iop_Avg8Ux16: op = Xsse_AVG8U; goto do_SseReRg;
//.. case Iop_Avg16Ux8: op = Xsse_AVG16U; goto do_SseReRg;
//.. case Iop_CmpEQ8x16: op = Xsse_CMPEQ8; goto do_SseReRg;
//.. case Iop_CmpEQ16x8: op = Xsse_CMPEQ16; goto do_SseReRg;
//.. case Iop_CmpEQ32x4: op = Xsse_CMPEQ32; goto do_SseReRg;
//.. case Iop_CmpGT8Sx16: op = Xsse_CMPGT8S; goto do_SseReRg;
//.. case Iop_CmpGT16Sx8: op = Xsse_CMPGT16S; goto do_SseReRg;
//.. case Iop_CmpGT32Sx4: op = Xsse_CMPGT32S; goto do_SseReRg;
//.. case Iop_Max16Sx8: op = Xsse_MAX16S; goto do_SseReRg;
//.. case Iop_Max8Ux16: op = Xsse_MAX8U; goto do_SseReRg;
//.. case Iop_Min16Sx8: op = Xsse_MIN16S; goto do_SseReRg;
//.. case Iop_Min8Ux16: op = Xsse_MIN8U; goto do_SseReRg;
//.. case Iop_MulHi16Ux8: op = Xsse_MULHI16U; goto do_SseReRg;
//.. case Iop_MulHi16Sx8: op = Xsse_MULHI16S; goto do_SseReRg;
//.. case Iop_Mul16x8: op = Xsse_MUL16; goto do_SseReRg;
//.. case Iop_Sub8x16: op = Xsse_SUB8; goto do_SseReRg;
//.. case Iop_Sub16x8: op = Xsse_SUB16; goto do_SseReRg;
//.. case Iop_Sub32x4: op = Xsse_SUB32; goto do_SseReRg;
//.. case Iop_Sub64x2: op = Xsse_SUB64; goto do_SseReRg;
//.. case Iop_QSub8Sx16: op = Xsse_QSUB8S; goto do_SseReRg;
//.. case Iop_QSub16Sx8: op = Xsse_QSUB16S; goto do_SseReRg;
//.. case Iop_QSub8Ux16: op = Xsse_QSUB8U; goto do_SseReRg;
//.. case Iop_QSub16Ux8: op = Xsse_QSUB16U; goto do_SseReRg;
//.. do_SseReRg: {
//.. HReg arg1 = iselVecExpr(env, e->Iex.Binop.arg1);
//.. HReg arg2 = iselVecExpr(env, e->Iex.Binop.arg2);
//.. HReg dst = newVRegV(env);
//.. if (op != Xsse_OR && op != Xsse_AND && op != Xsse_XOR)
//.. REQUIRE_SSE2;
//.. if (arg1isEReg) {
//.. addInstr(env, mk_vMOVsd_RR(arg2, dst));
//.. addInstr(env, X86Instr_SseReRg(op, arg1, dst));
//.. } else {
//.. addInstr(env, mk_vMOVsd_RR(arg1, dst));
//.. addInstr(env, X86Instr_SseReRg(op, arg2, dst));
//.. }
//.. return dst;
//.. }
//..
//.. case Iop_ShlN16x8: op = Xsse_SHL16; goto do_SseShift;
//.. case Iop_ShlN32x4: op = Xsse_SHL32; goto do_SseShift;
//.. case Iop_ShlN64x2: op = Xsse_SHL64; goto do_SseShift;
//.. case Iop_SarN16x8: op = Xsse_SAR16; goto do_SseShift;
//.. case Iop_SarN32x4: op = Xsse_SAR32; goto do_SseShift;
//.. case Iop_ShrN16x8: op = Xsse_SHR16; goto do_SseShift;
//.. case Iop_ShrN32x4: op = Xsse_SHR32; goto do_SseShift;
//.. case Iop_ShrN64x2: op = Xsse_SHR64; goto do_SseShift;
//.. do_SseShift: {
//.. HReg greg = iselVecExpr(env, e->Iex.Binop.arg1);
//.. X86RMI* rmi = iselIntExpr_RMI(env, e->Iex.Binop.arg2);
//.. X86AMode* esp0 = X86AMode_IR(0, hregX86_ESP());
//.. HReg ereg = newVRegV(env);
//.. HReg dst = newVRegV(env);
//.. REQUIRE_SSE2;
//.. addInstr(env, X86Instr_Push(X86RMI_Imm(0)));
//.. addInstr(env, X86Instr_Push(X86RMI_Imm(0)));
//.. addInstr(env, X86Instr_Push(X86RMI_Imm(0)));
//.. addInstr(env, X86Instr_Push(rmi));
//.. addInstr(env, X86Instr_SseLdSt(True/*load*/, ereg, esp0));
//.. addInstr(env, mk_vMOVsd_RR(greg, dst));
//.. addInstr(env, X86Instr_SseReRg(op, ereg, dst));
//.. add_to_esp(env, 16);
//.. return dst;
//.. }
//..
//.. default:
//.. break;
//.. } /* switch (e->Iex.Binop.op) */
//.. } /* if (e->tag == Iex_Binop) */
//..
//.. if (e->tag == Iex_Mux0X) {
//.. HReg r8 = iselIntExpr_R(env, e->Iex.Mux0X.cond);
//.. HReg rX = iselVecExpr(env, e->Iex.Mux0X.exprX);
//.. HReg r0 = iselVecExpr(env, e->Iex.Mux0X.expr0);
//.. HReg dst = newVRegV(env);
//.. addInstr(env, mk_vMOVsd_RR(rX,dst));
//.. addInstr(env, X86Instr_Test32(X86RI_Imm(0xFF), X86RM_Reg(r8)));
//.. addInstr(env, X86Instr_SseCMov(Xcc_Z,r0,dst));
//.. return dst;
//.. }
vec_fail:
vex_printf("iselVecExpr(ppc32) (subarch = %s): can't reduce\n",
LibVEX_ppVexSubArch(env->subarch));
ppIRExpr(e);
vpanic("iselVecExpr_wrk(ppc32)");
}
/*---------------------------------------------------------*/
/*--- ISEL: Statements ---*/
/*---------------------------------------------------------*/
static void iselStmt ( ISelEnv* env, IRStmt* stmt )
{
if (vex_traceflags & VEX_TRACE_VCODE) {
vex_printf("\n -- ");
ppIRStmt(stmt);
vex_printf("\n");
}
switch (stmt->tag) {
/* --------- STORE --------- */
case Ist_STle: {
PPC32AMode* am_addr;
IRType tya = typeOfIRExpr(env->type_env, stmt->Ist.STle.addr);
IRType tyd = typeOfIRExpr(env->type_env, stmt->Ist.STle.data);
vassert(tya == Ity_I32);
am_addr = iselIntExpr_AMode(env, stmt->Ist.STle.addr);
if (tyd == Ity_I8 || tyd == Ity_I16 || tyd == Ity_I32) {
HReg r_src = iselIntExpr_R(env, stmt->Ist.STle.data);
addInstr(env, PPC32Instr_Store(sizeofIRType(tyd), am_addr, r_src));
return;
}
if (tyd == Ity_F64) {
HReg fr_src = iselDblExpr(env, stmt->Ist.STle.data);
addInstr(env, PPC32Instr_FpLdSt(False/*store*/, 8, fr_src, am_addr));
return;
}
if (tyd == Ity_F32) {
HReg fr_src = iselFltExpr(env, stmt->Ist.STle.data);
addInstr(env, PPC32Instr_FpLdSt(False/*store*/, 4, fr_src, am_addr));
return;
}
//.. if (tyd == Ity_I64) {
//.. HReg vHi, vLo, rA;
//.. iselInt64Expr(&vHi, &vLo, env, stmt->Ist.STle.data);
//.. rA = iselIntExpr_R(env, stmt->Ist.STle.addr);
//.. addInstr(env, X86Instr_Alu32M(
//.. Xalu_MOV, X86RI_Reg(vLo), X86AMode_IR(0, rA)));
//.. addInstr(env, X86Instr_Alu32M(
//.. Xalu_MOV, X86RI_Reg(vHi), X86AMode_IR(4, rA)));
//.. return;
//.. }
if (tyd == Ity_V128) {
HReg v_src = iselVecExpr(env, stmt->Ist.STle.data);
addInstr(env, PPC32Instr_AvLdSt(False/*store*/, 16, v_src, am_addr));
return;
}
break;
}
/* --------- PUT --------- */
case Ist_Put: {
IRType ty = typeOfIRExpr(env->type_env, stmt->Ist.Put.data);
if (ty == Ity_I8 || ty == Ity_I16 || ty == Ity_I32) {
HReg r_src = iselIntExpr_R(env, stmt->Ist.Put.data);
PPC32AMode* am_addr = PPC32AMode_IR(stmt->Ist.Put.offset, GuestStatePtr);
addInstr(env, PPC32Instr_Store( sizeofIRType(ty), am_addr, r_src ));
return;
}
if (ty == Ity_I64) {
HReg rHi, rLo;
PPC32AMode* am_addr = PPC32AMode_IR(stmt->Ist.Put.offset, GuestStatePtr);
PPC32AMode* am_addr4 = advance4(env, am_addr);
iselInt64Expr(&rHi,&rLo, env, stmt->Ist.Put.data);
addInstr(env, PPC32Instr_Store( 4, am_addr, rHi ));
addInstr(env, PPC32Instr_Store( 4, am_addr4, rLo ));
return;
}
//.. if (ty == Ity_V128) {
//.. HReg vec = iselVecExpr(env, stmt->Ist.Put.data);
//.. X86AMode* am = X86AMode_IR(stmt->Ist.Put.offset, hregX86_EBP());
//.. addInstr(env, X86Instr_SseLdSt(False/*store*/, vec, am));
//.. return;
//.. }
//.. if (ty == Ity_F32) {
//.. HReg f32 = iselFltExpr(env, stmt->Ist.Put.data);
//.. X86AMode* am = X86AMode_IR(stmt->Ist.Put.offset, hregX86_EBP());
//.. set_FPU_rounding_default(env); /* paranoia */
//.. addInstr(env, X86Instr_FpLdSt( False/*store*/, 4, f32, am ));
//.. return;
//.. }
if (ty == Ity_F64) {
HReg fr_src = iselDblExpr(env, stmt->Ist.Put.data);
PPC32AMode* am_addr = PPC32AMode_IR(stmt->Ist.Put.offset, GuestStatePtr);
addInstr(env, PPC32Instr_FpLdSt( False/*store*/, 8, fr_src, am_addr ));
return;
}
break;
}
//.. /* --------- Indexed PUT --------- */
//.. case Ist_PutI: {
//.. X86AMode* am
//.. = genGuestArrayOffset(
//.. env, stmt->Ist.PutI.descr,
//.. stmt->Ist.PutI.ix, stmt->Ist.PutI.bias );
//..
//.. IRType ty = typeOfIRExpr(env->type_env, stmt->Ist.PutI.data);
//.. if (ty == Ity_F64) {
//.. HReg val = iselDblExpr(env, stmt->Ist.PutI.data);
//.. addInstr(env, X86Instr_FpLdSt( False/*store*/, 8, val, am ));
//.. return;
//.. }
//.. if (ty == Ity_I8) {
//.. HReg r = iselIntExpr_R(env, stmt->Ist.PutI.data);
//.. addInstr(env, X86Instr_Store( 1, r, am ));
//.. return;
//.. }
//.. if (ty == Ity_I64) {
//.. HReg rHi, rLo;
//.. X86AMode* am4 = advance4(am);
//.. iselInt64Expr(&rHi, &rLo, env, stmt->Ist.PutI.data);
//.. addInstr(env, X86Instr_Alu32M( Xalu_MOV, X86RI_Reg(rLo), am ));
//.. addInstr(env, X86Instr_Alu32M( Xalu_MOV, X86RI_Reg(rHi), am4 ));
//.. return;
//.. }
//.. break;
//.. }
/* --------- TMP --------- */
case Ist_Tmp: {
IRTemp tmp = stmt->Ist.Tmp.tmp;
IRType ty = typeOfIRTemp(env->type_env, tmp);
if (ty == Ity_I32 || ty == Ity_I16 || ty == Ity_I8) {
HReg r_dst = lookupIRTemp(env, tmp);
HReg r_src = iselIntExpr_R(env, stmt->Ist.Tmp.data);
addInstr(env, mk_iMOVds_RR( r_dst, r_src ));
return;
}
if (ty == Ity_I64) {
HReg r_srcHi, r_srcLo, r_dstHi, r_dstLo;
iselInt64Expr(&r_srcHi,&r_srcLo, env, stmt->Ist.Tmp.data);
lookupIRTemp64( &r_dstHi, &r_dstLo, env, tmp);
addInstr(env, mk_iMOVds_RR(r_dstHi, r_srcHi) );
addInstr(env, mk_iMOVds_RR(r_dstLo, r_srcLo) );
return;
}
if (ty == Ity_I1) {
PPC32CondCode cond = iselCondCode(env, stmt->Ist.Tmp.data);
HReg r_dst = lookupIRTemp(env, tmp);
addInstr(env, PPC32Instr_Set32(cond, r_dst));
return;
}
if (ty == Ity_F64) {
HReg fr_dst = lookupIRTemp(env, tmp);
HReg fr_src = iselDblExpr(env, stmt->Ist.Tmp.data);
addInstr(env, PPC32Instr_FpUnary(Pfp_MOV, fr_dst, fr_src));
return;
}
if (ty == Ity_F32) {
HReg fr_dst = lookupIRTemp(env, tmp);
HReg fr_src = iselFltExpr(env, stmt->Ist.Tmp.data);
addInstr(env, PPC32Instr_FpUnary(Pfp_MOV, fr_dst, fr_src));
return;
}
if (ty == Ity_V128) {
HReg v_dst = lookupIRTemp(env, tmp);
HReg v_src = iselVecExpr(env, stmt->Ist.Tmp.data);
addInstr(env, PPC32Instr_AvUnary(Pav_MOV, v_dst, v_src));
return;
}
break;
}
/* --------- Call to DIRTY helper --------- */
case Ist_Dirty: {
IRType retty;
IRDirty* d = stmt->Ist.Dirty.details;
Bool passBBP = False;
if (d->nFxState == 0)
vassert(!d->needsBBP);
passBBP = d->nFxState > 0 && d->needsBBP;
/* Marshal args, do the call, clear stack. */
doHelperCall( env, passBBP, d->guard, d->cee, d->args );
/* Now figure out what to do with the returned value, if any. */
if (d->tmp == IRTemp_INVALID)
/* No return value. Nothing to do. */
return;
retty = typeOfIRTemp(env->type_env, d->tmp);
if (retty == Ity_I64) {
HReg r_dstHi, r_dstLo;
/* The returned value is in %r3:%r4. Park it in the
register-pair associated with tmp. */
lookupIRTemp64( &r_dstHi, &r_dstLo, env, d->tmp);
addInstr(env, mk_iMOVds_RR(r_dstHi, hregPPC32_GPR3()));
addInstr(env, mk_iMOVds_RR(r_dstLo, hregPPC32_GPR4()));
return;
}
if (retty == Ity_I32 || retty == Ity_I16 || retty == Ity_I8) {
/* The returned value is in %r3. Park it in the register
associated with tmp. */
HReg r_dst = lookupIRTemp(env, d->tmp);
addInstr(env, mk_iMOVds_RR(r_dst, hregPPC32_GPR3()));
return;
}
break;
}
/* --------- MEM FENCE --------- */
case Ist_MFence:
addInstr(env, PPC32Instr_MFence());
return;
/* --------- INSTR MARK --------- */
/* Doesn't generate any executable code ... */
case Ist_IMark:
return;
/* --------- NO-OP --------- */
/* Fairly self-explanatory, wouldn't you say? */
case Ist_NoOp:
return;
/* --------- EXIT --------- */
case Ist_Exit: {
PPC32RI* ri_dst;
PPC32CondCode cc;
if (stmt->Ist.Exit.dst->tag != Ico_U32)
vpanic("isel_ppc32: Ist_Exit: dst is not a 32-bit value");
ri_dst = iselIntExpr_RI(env, IRExpr_Const(stmt->Ist.Exit.dst));
cc = iselCondCode(env,stmt->Ist.Exit.guard);
addInstr(env, PPC32Instr_RdWrLR(True, env->savedLR));
addInstr(env, PPC32Instr_Goto(stmt->Ist.Exit.jk, cc, ri_dst));
return;
}
default: break;
}
ppIRStmt(stmt);
vpanic("iselStmt(ppc32)");
}
/*---------------------------------------------------------*/
/*--- ISEL: Basic block terminators (Nexts) ---*/
/*---------------------------------------------------------*/
static void iselNext ( ISelEnv* env, IRExpr* next, IRJumpKind jk )
{
PPC32CondCode cond;
PPC32RI* ri;
if (vex_traceflags & VEX_TRACE_VCODE) {
vex_printf("\n-- goto {");
ppIRJumpKind(jk);
vex_printf("} ");
ppIRExpr(next);
vex_printf("\n");
}
cond = mk_PPCCondCode( Pct_ALWAYS, Pcf_EQ );
ri = iselIntExpr_RI(env, next);
addInstr(env, PPC32Instr_RdWrLR(True, env->savedLR));
addInstr(env, PPC32Instr_Goto(jk, cond, ri));
}
/*---------------------------------------------------------*/
/*--- Insn selector top-level ---*/
/*---------------------------------------------------------*/
/* Translate an entire BB to ppc32 code. */
HInstrArray* iselBB_PPC32 ( IRBB* bb, VexArchInfo* archinfo_host )
{
Int i, j;
HReg hreg, hregHI;
ISelEnv* env;
VexSubArch subarch_host = archinfo_host->subarch;
/* sanity ... */
vassert(subarch_host == VexSubArchPPC32_noAV
|| subarch_host == VexSubArchPPC32_AV);
/* Make up an initial environment to use. */
env = LibVEX_Alloc(sizeof(ISelEnv));
env->vreg_ctr = 0;
/* Set up output code array. */
env->code = newHInstrArray();
/* Copy BB's type env. */
env->type_env = bb->tyenv;
/* Make up an IRTemp -> virtual HReg mapping. This doesn't
change as we go along. */
env->n_vregmap = bb->tyenv->types_used;
env->vregmap = LibVEX_Alloc(env->n_vregmap * sizeof(HReg));
env->vregmapHI = LibVEX_Alloc(env->n_vregmap * sizeof(HReg));
/* and finally ... */
env->subarch = subarch_host;
/* For each IR temporary, allocate a suitably-kinded virtual
register. */
j = 0;
for (i = 0; i < env->n_vregmap; i++) {
hregHI = hreg = INVALID_HREG;
switch (bb->tyenv->types[i]) {
case Ity_I1:
case Ity_I8:
case Ity_I16:
case Ity_I32: hreg = mkHReg(j++, HRcInt32, True); break;
case Ity_I64: hreg = mkHReg(j++, HRcInt32, True);
hregHI = mkHReg(j++, HRcInt32, True); break;
case Ity_F32:
case Ity_F64: hreg = mkHReg(j++, HRcFlt64, True); break;
case Ity_V128: hreg = mkHReg(j++, HRcVec128, True); break;
default:
ppIRType(bb->tyenv->types[i]);
vpanic("iselBB(ppc32): IRTemp type");
}
env->vregmap[i] = hreg;
env->vregmapHI[i] = hregHI;
}
env->vreg_ctr = j;
/* Keep a copy of the link reg, so helper functions don't kill it. */
env->savedLR = newVRegI(env);
addInstr(env, PPC32Instr_RdWrLR(False, env->savedLR));
/* Ok, finally we can iterate over the statements. */
for (i = 0; i < bb->stmts_used; i++)
if (bb->stmts[i])
iselStmt(env,bb->stmts[i]);
iselNext(env,bb->next,bb->jumpkind);
/* record the number of vregs we used. */
env->code->n_vregs = env->vreg_ctr;
return env->code;
}
/*---------------------------------------------------------------*/
/*--- end host-ppc32/isel.c ---*/
/*---------------------------------------------------------------*/